SlideShare a Scribd company logo
7-1 Ratio and Proportion
Chapter 7 Ratio, Proportion and
Similarity
Objective: I can set up and simplify ratios and
proportions as well as use the properties of
proportions to solve problems.
A ratio is a comparison of two quantities by
division.
 Ratios are expressed
in simplest form.
 When units are
involved the ratio can
only be expressed in
terms of the same
unit.
 Three ways to
express a ratio of a to
b.
1. a to b
2. a:b
3.
𝑎
𝑏
Exampl
e
The bonsai bald cypress tree is a small version
of a full-size tree. A Florida bald cypress tree
called the Senator stands 118 ft. tall. What is
the ratio of the height of the bonsai to the
height of the Senator?
Both quantities need to be in the same units.
118 𝑓𝑡
1
⋅
12 𝑖𝑛
1 𝑓𝑡
= 1416 𝑖𝑛.
Write the ratio as a fraction:
15 𝑖𝑛
1416 𝑖𝑛
=
5
472
The ratio of the height of the bonsai to the
height of the Senator is 5 to 472 or
5
472
or 5:472.
More Examples
 Use the diagram to find the value of each ratio.
1. 𝐴𝐵: 𝐴𝐶
2. 𝐵𝐶 to 𝐴𝐶
3.
𝐵𝐶
𝐴𝐵
4.
𝑚∠𝐶
𝑚∠𝐴
5. Express the ratio of the diameter of a salad
plate (8 in.) to the diameter of a dinner plate (1
ft.).
Answers: 1. 1:2, 2. 9 to 8, 3.
9
4
, 4.
2
7
, 5. 2:3
An extended ratio compares three (or
more) numbers.
 In the extended ratio a:b:c
 the ratio of the first two numbers is a:b;
 the ratio of the second two numbers is b:c;
 the ratio of the first and last numbers is a:c.
Example with extended ratio.
 Example: The lengths of the sides of a triangle are in
the ratio 3:5:6. The perimeter of the triangle is 98
in. What is the length of the longest side? (Let x
represent the common factor used to reduce the
original lengths in the ratio.)
 3𝑥 + 5𝑥 + 6𝑥 = 98 The perimeter is 98 in.
 14𝑥 = 98
 𝑥 = 7
A proportion is an equation stating that
two ratios are equal.
 For example:

𝑎
𝑏
=
𝑐
𝑑
which is also written 𝑎: 𝑏 = 𝑐: 𝑑
 read “a is to b as c is to d”
 a and d (first and last terms) are called the
extremes of the proportion
 b and c (middle terms) are called the means of
the proportion
 When three or more ratios are equal , then you
can write an extended proportion.

𝑎
𝑏
=
𝑐
𝑑
=
𝑒
𝑓
7-2 Properties of Proportions
1.
𝑎
𝑏
=
𝑐
𝑑
is equivalent to:
a. 𝑎𝑑 = 𝑏𝑐 (Means-Extremes Property)
b.
𝑎
𝑐
=
𝑏
𝑑
c.
𝑏
𝑎
=
𝑑
𝑐
d.
𝑎+𝑏
𝑏
=
𝑐+𝑑
𝑑
2. If
𝑎
𝑏
=
𝑐
𝑑
=
𝑒
𝑓
= ⋯, then
𝑎+𝑐+𝑒+⋯
𝑏+𝑑+𝑓+⋯
=
𝑎
𝑏
= ⋯
Examples
 Use Properties of Proportions to complete each
statement.
1. If
𝑎
𝑏
=
2
3
, then 3𝑎 = ___.
2. If
𝑐
𝑑
=
4
7
, then
𝑑
𝑐
= ___.
3. If
𝑒
𝑓
=
5
9
, then
𝑒
5
=___.
4. If
𝑘
𝑚
=
2
3
, then
𝑘+𝑚
𝑚
=___.
5. Given the proportion
𝑎
𝑏
=
2
3
, the means are
_____.
Answers: 1. 2b, 2.
7
4
, 3.
𝑓
9
, 4.
5
3
, 5. b and 2

More Related Content

What's hot

Ratio slideshow
Ratio slideshowRatio slideshow
Ratio slideshow
chrystal_brinson
 
Direct proportion
Direct proportionDirect proportion
Comparing and Ordering Integers
Comparing and Ordering IntegersComparing and Ordering Integers
Comparing and Ordering Integers
Brooke Young
 
Laws of exponents
Laws of exponentsLaws of exponents
Laws of exponentsmasljr
 
7.2 Similar Polygons
7.2 Similar Polygons7.2 Similar Polygons
7.2 Similar Polygons
smiller5
 
Ratio and Proportion
Ratio and ProportionRatio and Proportion
Ratio and Proportion
Cristy Melloso
 
Prime Factorization
Prime FactorizationPrime Factorization
Prime Factorizationmmeddin
 
Algebra Expressions in Word Problems
Algebra Expressions in Word ProblemsAlgebra Expressions in Word Problems
Algebra Expressions in Word Problems
Passy World
 
Algebra Expressions and Equations
Algebra Expressions and EquationsAlgebra Expressions and Equations
Algebra Expressions and Equations
Kelly Williams
 
Similar figures and_proportions
Similar figures and_proportionsSimilar figures and_proportions
Similar figures and_proportions
karen wagoner
 
Prime Factorization
Prime FactorizationPrime Factorization
Prime Factorization
Nicole Gough
 
Writing linear equations
Writing linear equationsWriting linear equations
Writing linear equationsJessica Garcia
 
Factoring by grouping ppt
Factoring by grouping pptFactoring by grouping ppt
Factoring by grouping ppt
Doreen Mhizha
 
Prime factorization ppt
Prime factorization pptPrime factorization ppt
Prime factorization ppt
Heidi Sager
 
Ratio and proportion
Ratio and proportionRatio and proportion
Ratio and proportion
JohnTitoLerios
 
Absolute Value Equations and Inequalities
Absolute Value Equations and InequalitiesAbsolute Value Equations and Inequalities
Absolute Value Equations and Inequalities
dmidgette
 
2.7.5 Kites and Trapezoids
2.7.5 Kites and Trapezoids2.7.5 Kites and Trapezoids
2.7.5 Kites and Trapezoids
smiller5
 
Factors and Multiples
Factors and MultiplesFactors and Multiples
Factors and Multiples
JaizaDemecillo
 

What's hot (20)

Ratio slideshow
Ratio slideshowRatio slideshow
Ratio slideshow
 
Direct proportion
Direct proportionDirect proportion
Direct proportion
 
Comparing and Ordering Integers
Comparing and Ordering IntegersComparing and Ordering Integers
Comparing and Ordering Integers
 
Frequency tables and line plots
Frequency tables and line plotsFrequency tables and line plots
Frequency tables and line plots
 
Laws of exponents
Laws of exponentsLaws of exponents
Laws of exponents
 
7.2 Similar Polygons
7.2 Similar Polygons7.2 Similar Polygons
7.2 Similar Polygons
 
Ratio and Proportion
Ratio and ProportionRatio and Proportion
Ratio and Proportion
 
Prime Factorization
Prime FactorizationPrime Factorization
Prime Factorization
 
Algebra Expressions in Word Problems
Algebra Expressions in Word ProblemsAlgebra Expressions in Word Problems
Algebra Expressions in Word Problems
 
Algebra Terminologies
Algebra TerminologiesAlgebra Terminologies
Algebra Terminologies
 
Algebra Expressions and Equations
Algebra Expressions and EquationsAlgebra Expressions and Equations
Algebra Expressions and Equations
 
Similar figures and_proportions
Similar figures and_proportionsSimilar figures and_proportions
Similar figures and_proportions
 
Prime Factorization
Prime FactorizationPrime Factorization
Prime Factorization
 
Writing linear equations
Writing linear equationsWriting linear equations
Writing linear equations
 
Factoring by grouping ppt
Factoring by grouping pptFactoring by grouping ppt
Factoring by grouping ppt
 
Prime factorization ppt
Prime factorization pptPrime factorization ppt
Prime factorization ppt
 
Ratio and proportion
Ratio and proportionRatio and proportion
Ratio and proportion
 
Absolute Value Equations and Inequalities
Absolute Value Equations and InequalitiesAbsolute Value Equations and Inequalities
Absolute Value Equations and Inequalities
 
2.7.5 Kites and Trapezoids
2.7.5 Kites and Trapezoids2.7.5 Kites and Trapezoids
2.7.5 Kites and Trapezoids
 
Factors and Multiples
Factors and MultiplesFactors and Multiples
Factors and Multiples
 

Viewers also liked

Section 3.6 ratios and proportions (Algebra)
Section 3.6 ratios and proportions (Algebra)Section 3.6 ratios and proportions (Algebra)
Section 3.6 ratios and proportions (Algebra)Algebra / Mathematics
 
Ratios and Unit Rates
Ratios and Unit RatesRatios and Unit Rates
Ratios and Unit Ratesbujols
 
Unit 3 ratio, proportion, profit and loss
Unit 3 ratio, proportion, profit and lossUnit 3 ratio, proportion, profit and loss
Unit 3 ratio, proportion, profit and loss
Rai University
 
Ratio, Rates And Proprotion
Ratio, Rates And ProprotionRatio, Rates And Proprotion
Ratio, Rates And Proprotionkliegey524
 
NOTE MATH FORM 3 - 14 ratio rate
NOTE MATH FORM 3 - 14 ratio rateNOTE MATH FORM 3 - 14 ratio rate
NOTE MATH FORM 3 - 14 ratio rateNad0209
 
1 - Ratios & Proportions
1 - Ratios & Proportions1 - Ratios & Proportions
1 - Ratios & Proportions
Lara Williams
 
Business Math Chapter 1
Business Math Chapter 1Business Math Chapter 1
Business Math Chapter 1
Nazrin Nazdri
 
Grade 9 Mathematics Module 6 Similarity
Grade 9 Mathematics Module 6 SimilarityGrade 9 Mathematics Module 6 Similarity
Grade 9 Mathematics Module 6 Similarity
Paolo Dagaojes
 

Viewers also liked (11)

Section 3.6 ratios and proportions (Algebra)
Section 3.6 ratios and proportions (Algebra)Section 3.6 ratios and proportions (Algebra)
Section 3.6 ratios and proportions (Algebra)
 
Ratios and Unit Rates
Ratios and Unit RatesRatios and Unit Rates
Ratios and Unit Rates
 
Unit 3 ratio, proportion, profit and loss
Unit 3 ratio, proportion, profit and lossUnit 3 ratio, proportion, profit and loss
Unit 3 ratio, proportion, profit and loss
 
Ratio, Rates And Proprotion
Ratio, Rates And ProprotionRatio, Rates And Proprotion
Ratio, Rates And Proprotion
 
Ratio
RatioRatio
Ratio
 
NOTE MATH FORM 3 - 14 ratio rate
NOTE MATH FORM 3 - 14 ratio rateNOTE MATH FORM 3 - 14 ratio rate
NOTE MATH FORM 3 - 14 ratio rate
 
Proportion
ProportionProportion
Proportion
 
1 - Ratios & Proportions
1 - Ratios & Proportions1 - Ratios & Proportions
1 - Ratios & Proportions
 
Business Math Chapter 1
Business Math Chapter 1Business Math Chapter 1
Business Math Chapter 1
 
Ratios
RatiosRatios
Ratios
 
Grade 9 Mathematics Module 6 Similarity
Grade 9 Mathematics Module 6 SimilarityGrade 9 Mathematics Module 6 Similarity
Grade 9 Mathematics Module 6 Similarity
 

Similar to 7 1 7-2 ratios and proportions

Ratio and Proportion, Indices and Logarithm Part 1
Ratio and Proportion, Indices and Logarithm Part 1Ratio and Proportion, Indices and Logarithm Part 1
Ratio and Proportion, Indices and Logarithm Part 1
FellowBuddy.com
 
Introduction to Ratio
Introduction to RatioIntroduction to Ratio
Introduction to Ratio
FellowBuddy.com
 
RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...
RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...
RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...
SOURAV DAS
 
aptitude presentation.pptx
aptitude presentation.pptxaptitude presentation.pptx
aptitude presentation.pptx
sourabhverma59500
 
Algebra
AlgebraAlgebra
SIMILARITY OF TRIANGLES.pptx
SIMILARITY OF TRIANGLES.pptxSIMILARITY OF TRIANGLES.pptx
SIMILARITY OF TRIANGLES.pptx
AshBallesteros
 
Ratios, proportions, similar figures
Ratios, proportions, similar figuresRatios, proportions, similar figures
Ratios, proportions, similar figuresElka Veselinova
 
RATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.ppt
RATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.pptRATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.ppt
RATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.ppt
RamanDhawan2
 
Ratio
RatioRatio
Geo 7-1 Ratios and Proportions
Geo 7-1 Ratios and ProportionsGeo 7-1 Ratios and Proportions
Geo 7-1 Ratios and Proportions
jtentinger
 
Algebra 1 Honors Chaper 4
Algebra 1 Honors Chaper 4Algebra 1 Honors Chaper 4
Algebra 1 Honors Chaper 4
guest8c77631
 
Linear inequalities
Linear inequalitiesLinear inequalities
Linear inequalities
Mark Ryder
 
Maths glossary
Maths glossary Maths glossary
Maths glossary
sandhyajayalekshmi
 
Ratio Rates and Proportion.pdf
Ratio Rates and Proportion.pdfRatio Rates and Proportion.pdf
Ratio Rates and Proportion.pdf
NadineThomas4
 
RATIO AND PROPORTION
RATIO AND PROPORTIONRATIO AND PROPORTION
RATIO AND PROPORTION
Lea Perez
 
Ratio and Proportion
Ratio and ProportionRatio and Proportion
Ratio and Proportion
Lea Perez
 

Similar to 7 1 7-2 ratios and proportions (20)

Ratio and Proportion, Indices and Logarithm Part 1
Ratio and Proportion, Indices and Logarithm Part 1Ratio and Proportion, Indices and Logarithm Part 1
Ratio and Proportion, Indices and Logarithm Part 1
 
Introduction to Ratio
Introduction to RatioIntroduction to Ratio
Introduction to Ratio
 
RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...
RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...
RATIO NAD PROPORTION FOR CAT , MAT , MBA , BANKING , RAILWAYS , GOVERNMENT RE...
 
aptitude presentation.pptx
aptitude presentation.pptxaptitude presentation.pptx
aptitude presentation.pptx
 
Algebra
AlgebraAlgebra
Algebra
 
SIMILARITY OF TRIANGLES.pptx
SIMILARITY OF TRIANGLES.pptxSIMILARITY OF TRIANGLES.pptx
SIMILARITY OF TRIANGLES.pptx
 
Ratios, proportions, similar figures
Ratios, proportions, similar figuresRatios, proportions, similar figures
Ratios, proportions, similar figures
 
RATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.ppt
RATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.pptRATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.ppt
RATIOS_PROPORTIONS_AND_SIMILAR_FIGURES.ppt
 
Ratio
RatioRatio
Ratio
 
Geo 7-1 Ratios and Proportions
Geo 7-1 Ratios and ProportionsGeo 7-1 Ratios and Proportions
Geo 7-1 Ratios and Proportions
 
Algebra 1 Honors Chaper 4
Algebra 1 Honors Chaper 4Algebra 1 Honors Chaper 4
Algebra 1 Honors Chaper 4
 
Linear inequalities
Linear inequalitiesLinear inequalities
Linear inequalities
 
Maths glossary
Maths glossary Maths glossary
Maths glossary
 
Ratio Rates and Proportion.pdf
Ratio Rates and Proportion.pdfRatio Rates and Proportion.pdf
Ratio Rates and Proportion.pdf
 
Quant01
Quant01Quant01
Quant01
 
6.1g
6.1g6.1g
6.1g
 
6.1g
6.1g6.1g
6.1g
 
Mathtest 01
Mathtest 01Mathtest 01
Mathtest 01
 
RATIO AND PROPORTION
RATIO AND PROPORTIONRATIO AND PROPORTION
RATIO AND PROPORTION
 
Ratio and Proportion
Ratio and ProportionRatio and Proportion
Ratio and Proportion
 

More from lmrogers03

8.7 Angles of Elevation and Depression
8.7 Angles of Elevation and Depression8.7 Angles of Elevation and Depression
8.7 Angles of Elevation and Depression
lmrogers03
 
Sine and Cosine Right Triangle Geometry
Sine and Cosine Right Triangle GeometrySine and Cosine Right Triangle Geometry
Sine and Cosine Right Triangle Geometry
lmrogers03
 
Tangent Ratio
Tangent RatioTangent Ratio
Tangent Ratio
lmrogers03
 
8 3 Converse of Pythagorean Theorem
8 3 Converse of Pythagorean Theorem8 3 Converse of Pythagorean Theorem
8 3 Converse of Pythagorean Theorem
lmrogers03
 
8 1 Similarity in Right Triangles
8 1 Similarity in Right Triangles8 1 Similarity in Right Triangles
8 1 Similarity in Right Triangles
lmrogers03
 
7 6 Proportional Lengths
7 6 Proportional Lengths7 6 Proportional Lengths
7 6 Proportional Lengths
lmrogers03
 
7 4 Similar Triangles and t-5
7 4 Similar Triangles and t-57 4 Similar Triangles and t-5
7 4 Similar Triangles and t-5
lmrogers03
 
7-3 similar polygons
7-3 similar polygons7-3 similar polygons
7-3 similar polygons
lmrogers03
 
6 2 Parallelograms
6 2 Parallelograms6 2 Parallelograms
6 2 Parallelograms
lmrogers03
 
6 3 Proving Parallelograms
6 3 Proving Parallelograms6 3 Proving Parallelograms
6 3 Proving Parallelograms
lmrogers03
 
Midpoint and distance
Midpoint and distanceMidpoint and distance
Midpoint and distance
lmrogers03
 
1 6 construction
1 6 construction1 6 construction
1 6 construction
lmrogers03
 
Geometry Angle Pairs
Geometry Angle PairsGeometry Angle Pairs
Geometry Angle Pairs
lmrogers03
 
1 4angles
1 4angles1 4angles
1 4angles
lmrogers03
 
1 3
1 31 3
Geo final exam review
Geo final exam reviewGeo final exam review
Geo final exam review
lmrogers03
 
Equations of circles
Equations of circlesEquations of circles
Equations of circleslmrogers03
 
6 5 Inequalities in Two Triangles
6 5 Inequalities in Two Triangles6 5 Inequalities in Two Triangles
6 5 Inequalities in Two Triangles
lmrogers03
 
6 4 Inequalities in One Triangle
6 4 Inequalities in One Triangle6 4 Inequalities in One Triangle
6 4 Inequalities in One Trianglelmrogers03
 
Chapter 6 and 6-2
Chapter 6 and 6-2Chapter 6 and 6-2
Chapter 6 and 6-2
lmrogers03
 

More from lmrogers03 (20)

8.7 Angles of Elevation and Depression
8.7 Angles of Elevation and Depression8.7 Angles of Elevation and Depression
8.7 Angles of Elevation and Depression
 
Sine and Cosine Right Triangle Geometry
Sine and Cosine Right Triangle GeometrySine and Cosine Right Triangle Geometry
Sine and Cosine Right Triangle Geometry
 
Tangent Ratio
Tangent RatioTangent Ratio
Tangent Ratio
 
8 3 Converse of Pythagorean Theorem
8 3 Converse of Pythagorean Theorem8 3 Converse of Pythagorean Theorem
8 3 Converse of Pythagorean Theorem
 
8 1 Similarity in Right Triangles
8 1 Similarity in Right Triangles8 1 Similarity in Right Triangles
8 1 Similarity in Right Triangles
 
7 6 Proportional Lengths
7 6 Proportional Lengths7 6 Proportional Lengths
7 6 Proportional Lengths
 
7 4 Similar Triangles and t-5
7 4 Similar Triangles and t-57 4 Similar Triangles and t-5
7 4 Similar Triangles and t-5
 
7-3 similar polygons
7-3 similar polygons7-3 similar polygons
7-3 similar polygons
 
6 2 Parallelograms
6 2 Parallelograms6 2 Parallelograms
6 2 Parallelograms
 
6 3 Proving Parallelograms
6 3 Proving Parallelograms6 3 Proving Parallelograms
6 3 Proving Parallelograms
 
Midpoint and distance
Midpoint and distanceMidpoint and distance
Midpoint and distance
 
1 6 construction
1 6 construction1 6 construction
1 6 construction
 
Geometry Angle Pairs
Geometry Angle PairsGeometry Angle Pairs
Geometry Angle Pairs
 
1 4angles
1 4angles1 4angles
1 4angles
 
1 3
1 31 3
1 3
 
Geo final exam review
Geo final exam reviewGeo final exam review
Geo final exam review
 
Equations of circles
Equations of circlesEquations of circles
Equations of circles
 
6 5 Inequalities in Two Triangles
6 5 Inequalities in Two Triangles6 5 Inequalities in Two Triangles
6 5 Inequalities in Two Triangles
 
6 4 Inequalities in One Triangle
6 4 Inequalities in One Triangle6 4 Inequalities in One Triangle
6 4 Inequalities in One Triangle
 
Chapter 6 and 6-2
Chapter 6 and 6-2Chapter 6 and 6-2
Chapter 6 and 6-2
 

Recently uploaded

Embracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic ImperativeEmbracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic Imperative
Peter Windle
 
CACJapan - GROUP Presentation 1- Wk 4.pdf
CACJapan - GROUP Presentation 1- Wk 4.pdfCACJapan - GROUP Presentation 1- Wk 4.pdf
CACJapan - GROUP Presentation 1- Wk 4.pdf
camakaiclarkmusic
 
Digital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and ResearchDigital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and Research
Vikramjit Singh
 
678020731-Sumas-y-Restas-Para-Colorear.pdf
678020731-Sumas-y-Restas-Para-Colorear.pdf678020731-Sumas-y-Restas-Para-Colorear.pdf
678020731-Sumas-y-Restas-Para-Colorear.pdf
CarlosHernanMontoyab2
 
The Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official PublicationThe Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official Publication
Delapenabediema
 
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCECLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
BhavyaRajput3
 
Honest Reviews of Tim Han LMA Course Program.pptx
Honest Reviews of Tim Han LMA Course Program.pptxHonest Reviews of Tim Han LMA Course Program.pptx
Honest Reviews of Tim Han LMA Course Program.pptx
timhan337
 
Thesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.pptThesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.ppt
EverAndrsGuerraGuerr
 
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXXPhrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
MIRIAMSALINAS13
 
Operation Blue Star - Saka Neela Tara
Operation Blue Star   -  Saka Neela TaraOperation Blue Star   -  Saka Neela Tara
Operation Blue Star - Saka Neela Tara
Balvir Singh
 
The approach at University of Liverpool.pptx
The approach at University of Liverpool.pptxThe approach at University of Liverpool.pptx
The approach at University of Liverpool.pptx
Jisc
 
Unit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdfUnit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdf
Thiyagu K
 
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
Nguyen Thanh Tu Collection
 
1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx
JosvitaDsouza2
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
Vivekanand Anglo Vedic Academy
 
The Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptxThe Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptx
DhatriParmar
 
The Roman Empire A Historical Colossus.pdf
The Roman Empire A Historical Colossus.pdfThe Roman Empire A Historical Colossus.pdf
The Roman Empire A Historical Colossus.pdf
kaushalkr1407
 
Overview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with MechanismOverview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with Mechanism
DeeptiGupta154
 
Supporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptxSupporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptx
Jisc
 
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
Levi Shapiro
 

Recently uploaded (20)

Embracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic ImperativeEmbracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic Imperative
 
CACJapan - GROUP Presentation 1- Wk 4.pdf
CACJapan - GROUP Presentation 1- Wk 4.pdfCACJapan - GROUP Presentation 1- Wk 4.pdf
CACJapan - GROUP Presentation 1- Wk 4.pdf
 
Digital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and ResearchDigital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and Research
 
678020731-Sumas-y-Restas-Para-Colorear.pdf
678020731-Sumas-y-Restas-Para-Colorear.pdf678020731-Sumas-y-Restas-Para-Colorear.pdf
678020731-Sumas-y-Restas-Para-Colorear.pdf
 
The Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official PublicationThe Challenger.pdf DNHS Official Publication
The Challenger.pdf DNHS Official Publication
 
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCECLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
CLASS 11 CBSE B.St Project AIDS TO TRADE - INSURANCE
 
Honest Reviews of Tim Han LMA Course Program.pptx
Honest Reviews of Tim Han LMA Course Program.pptxHonest Reviews of Tim Han LMA Course Program.pptx
Honest Reviews of Tim Han LMA Course Program.pptx
 
Thesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.pptThesis Statement for students diagnonsed withADHD.ppt
Thesis Statement for students diagnonsed withADHD.ppt
 
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXXPhrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
Phrasal Verbs.XXXXXXXXXXXXXXXXXXXXXXXXXX
 
Operation Blue Star - Saka Neela Tara
Operation Blue Star   -  Saka Neela TaraOperation Blue Star   -  Saka Neela Tara
Operation Blue Star - Saka Neela Tara
 
The approach at University of Liverpool.pptx
The approach at University of Liverpool.pptxThe approach at University of Liverpool.pptx
The approach at University of Liverpool.pptx
 
Unit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdfUnit 2- Research Aptitude (UGC NET Paper I).pdf
Unit 2- Research Aptitude (UGC NET Paper I).pdf
 
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
BÀI TẬP BỔ TRỢ TIẾNG ANH GLOBAL SUCCESS LỚP 3 - CẢ NĂM (CÓ FILE NGHE VÀ ĐÁP Á...
 
1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
 
The Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptxThe Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptx
 
The Roman Empire A Historical Colossus.pdf
The Roman Empire A Historical Colossus.pdfThe Roman Empire A Historical Colossus.pdf
The Roman Empire A Historical Colossus.pdf
 
Overview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with MechanismOverview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with Mechanism
 
Supporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptxSupporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptx
 
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...
 

7 1 7-2 ratios and proportions

  • 1. 7-1 Ratio and Proportion Chapter 7 Ratio, Proportion and Similarity Objective: I can set up and simplify ratios and proportions as well as use the properties of proportions to solve problems.
  • 2. A ratio is a comparison of two quantities by division.  Ratios are expressed in simplest form.  When units are involved the ratio can only be expressed in terms of the same unit.  Three ways to express a ratio of a to b. 1. a to b 2. a:b 3. 𝑎 𝑏
  • 3. Exampl e The bonsai bald cypress tree is a small version of a full-size tree. A Florida bald cypress tree called the Senator stands 118 ft. tall. What is the ratio of the height of the bonsai to the height of the Senator? Both quantities need to be in the same units. 118 𝑓𝑡 1 ⋅ 12 𝑖𝑛 1 𝑓𝑡 = 1416 𝑖𝑛. Write the ratio as a fraction: 15 𝑖𝑛 1416 𝑖𝑛 = 5 472 The ratio of the height of the bonsai to the height of the Senator is 5 to 472 or 5 472 or 5:472.
  • 4. More Examples  Use the diagram to find the value of each ratio. 1. 𝐴𝐵: 𝐴𝐶 2. 𝐵𝐶 to 𝐴𝐶 3. 𝐵𝐶 𝐴𝐵 4. 𝑚∠𝐶 𝑚∠𝐴 5. Express the ratio of the diameter of a salad plate (8 in.) to the diameter of a dinner plate (1 ft.). Answers: 1. 1:2, 2. 9 to 8, 3. 9 4 , 4. 2 7 , 5. 2:3
  • 5. An extended ratio compares three (or more) numbers.  In the extended ratio a:b:c  the ratio of the first two numbers is a:b;  the ratio of the second two numbers is b:c;  the ratio of the first and last numbers is a:c.
  • 6. Example with extended ratio.  Example: The lengths of the sides of a triangle are in the ratio 3:5:6. The perimeter of the triangle is 98 in. What is the length of the longest side? (Let x represent the common factor used to reduce the original lengths in the ratio.)  3𝑥 + 5𝑥 + 6𝑥 = 98 The perimeter is 98 in.  14𝑥 = 98  𝑥 = 7
  • 7. A proportion is an equation stating that two ratios are equal.  For example:  𝑎 𝑏 = 𝑐 𝑑 which is also written 𝑎: 𝑏 = 𝑐: 𝑑  read “a is to b as c is to d”  a and d (first and last terms) are called the extremes of the proportion  b and c (middle terms) are called the means of the proportion  When three or more ratios are equal , then you can write an extended proportion.  𝑎 𝑏 = 𝑐 𝑑 = 𝑒 𝑓
  • 8. 7-2 Properties of Proportions 1. 𝑎 𝑏 = 𝑐 𝑑 is equivalent to: a. 𝑎𝑑 = 𝑏𝑐 (Means-Extremes Property) b. 𝑎 𝑐 = 𝑏 𝑑 c. 𝑏 𝑎 = 𝑑 𝑐 d. 𝑎+𝑏 𝑏 = 𝑐+𝑑 𝑑 2. If 𝑎 𝑏 = 𝑐 𝑑 = 𝑒 𝑓 = ⋯, then 𝑎+𝑐+𝑒+⋯ 𝑏+𝑑+𝑓+⋯ = 𝑎 𝑏 = ⋯
  • 9. Examples  Use Properties of Proportions to complete each statement. 1. If 𝑎 𝑏 = 2 3 , then 3𝑎 = ___. 2. If 𝑐 𝑑 = 4 7 , then 𝑑 𝑐 = ___. 3. If 𝑒 𝑓 = 5 9 , then 𝑒 5 =___. 4. If 𝑘 𝑚 = 2 3 , then 𝑘+𝑚 𝑚 =___. 5. Given the proportion 𝑎 𝑏 = 2 3 , the means are _____. Answers: 1. 2b, 2. 7 4 , 3. 𝑓 9 , 4. 5 3 , 5. b and 2