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


New Seats!
Intro to Stretching and Shrinking
› Mathematical Highlights
› Corresponding sides and angles



Work on tonight’s homework
› Pizzazz Worksheet page 130


How can you judge whether two objects
are similar?



They look alike and have the same
shape.


You probably use the word similar quite
a bit in everyday conversation. For
example, you might say that one song
sounds similar to another song or that
your friend’s bike is similar to yours.



Similar is also a mathematical word,
which is used to describe a type of
relationship between shapes.


Recognize similar figures visually and
identify that figures are similar by
comparing sides and angles.



Understand and use the equivalence of
ratios of sides to examine similar figures
and find unknown lengths.


Understand the relationship between
measures of lengths in figures and the
scale factor relating two similar figures.



Use the scale factor between figures to
scale a figure up or down and to predict
the lengths of corresponding edges and
areas.



Use the concept of similarity to solve
everyday problems.
WEEK 1: Quarter 2

Find a pair of
corresponding parts.
1.Side CA
2.Side CB
3.Angle D
4.Angle E
Please have your homework on your
desk and get started on your warm
up.
 Correct Pizzazz p. 130
 Investigation 1:Enlarging Figures
› 1.1 Stretching a figure (first test)
 Tonight’s homework
› Pizzazz worksheet p. 131



In this investigation, you will use rubber
bands to make enlargements of
drawings. Although this is not a precise
way to enlarge drawings, it’s fun- and
you can see some interesting
relationships between a figure and its
enlarged image.


As you work on this investigation, think
about these two questions:



When a figure is enlarged, which of its
features remain the same?



When a figure is enlarged, which of its
features change?


Michelle, Daphne,
and Max are the
officers of their
school’s Mystery
Book Club. Max
designed a flyer
inviting new
members to attend
the club’s next
meeting. (Read the
flyer.)


Daphne thought it would be a good
idea to make a large poster announcing
the meeting. She wanted to use the
detective figure from the flyer, but at a
larger size. Michelle showed her a clever
way to enlarge the figure by using
rubber bands.


Use your
stretcher to
enlarge the
figures on
Labsheets1.1
and 1.2
WEEK 1: Quarter 2

Find a pair of
corresponding parts
1. Side RH


2.

Side OL

3.

Define ratio

4.

Define scale factor
Please have your homework on
your desk and get started on your
warm up.
 Correct last night’s homework
 Work on


› Problem 1.1 (answer in your journal)


Homework
› Follow up 1.1
WEEK 1: Quarter 2



Compare the following objects






Please have your homework on your desk
and complete the warm up.
Discuss Follow up 1.1. Please write down
any answers that you do not have filled in.
Class Activity: 3 band stretcher with partners
Discuss Area of a circle
Tonight’s assignment
› Core Workbook p. 355 - 356
Area
Radius
Center

Diameter The diameter d is
twice the radius r.

d = 2r

Circumference
Remember!
Pi (π) is an irrational number that is often
approximated by the rational numbers 3.14
and 22 .
7
Welcome to Pre-Algebra Honors!
Friday
• Please have last night’s
homework on your desk and
your weekly assignment sheet.
• Correct core workbook p. 355 –
356
• Get started on Application 1
– What you do not finish is
homework

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Epistemic Interaction - tuning interfaces to provide information for AI supportEpistemic Interaction - tuning interfaces to provide information for AI support
Epistemic Interaction - tuning interfaces to provide information for AI support
 

Week1 (2)

  • 1.   New Seats! Intro to Stretching and Shrinking › Mathematical Highlights › Corresponding sides and angles  Work on tonight’s homework › Pizzazz Worksheet page 130
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  • 4.  How can you judge whether two objects are similar?  They look alike and have the same shape.
  • 5.  You probably use the word similar quite a bit in everyday conversation. For example, you might say that one song sounds similar to another song or that your friend’s bike is similar to yours.  Similar is also a mathematical word, which is used to describe a type of relationship between shapes.
  • 6.  Recognize similar figures visually and identify that figures are similar by comparing sides and angles.  Understand and use the equivalence of ratios of sides to examine similar figures and find unknown lengths.
  • 7.  Understand the relationship between measures of lengths in figures and the scale factor relating two similar figures.  Use the scale factor between figures to scale a figure up or down and to predict the lengths of corresponding edges and areas.  Use the concept of similarity to solve everyday problems.
  • 8. WEEK 1: Quarter 2 Find a pair of corresponding parts. 1.Side CA 2.Side CB 3.Angle D 4.Angle E
  • 9. Please have your homework on your desk and get started on your warm up.  Correct Pizzazz p. 130  Investigation 1:Enlarging Figures › 1.1 Stretching a figure (first test)  Tonight’s homework › Pizzazz worksheet p. 131 
  • 10.  In this investigation, you will use rubber bands to make enlargements of drawings. Although this is not a precise way to enlarge drawings, it’s fun- and you can see some interesting relationships between a figure and its enlarged image.
  • 11.  As you work on this investigation, think about these two questions:  When a figure is enlarged, which of its features remain the same?  When a figure is enlarged, which of its features change?
  • 12.  Michelle, Daphne, and Max are the officers of their school’s Mystery Book Club. Max designed a flyer inviting new members to attend the club’s next meeting. (Read the flyer.)
  • 13.  Daphne thought it would be a good idea to make a large poster announcing the meeting. She wanted to use the detective figure from the flyer, but at a larger size. Michelle showed her a clever way to enlarge the figure by using rubber bands.
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  • 16.  Use your stretcher to enlarge the figures on Labsheets1.1 and 1.2
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  • 18. WEEK 1: Quarter 2 Find a pair of corresponding parts 1. Side RH  2. Side OL 3. Define ratio 4. Define scale factor
  • 19. Please have your homework on your desk and get started on your warm up.  Correct last night’s homework  Work on  › Problem 1.1 (answer in your journal)  Homework › Follow up 1.1
  • 20. WEEK 1: Quarter 2  Compare the following objects
  • 21.      Please have your homework on your desk and complete the warm up. Discuss Follow up 1.1. Please write down any answers that you do not have filled in. Class Activity: 3 band stretcher with partners Discuss Area of a circle Tonight’s assignment › Core Workbook p. 355 - 356
  • 22. Area
  • 23. Radius Center Diameter The diameter d is twice the radius r. d = 2r Circumference
  • 24. Remember! Pi (π) is an irrational number that is often approximated by the rational numbers 3.14 and 22 . 7
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  • 26. Welcome to Pre-Algebra Honors! Friday • Please have last night’s homework on your desk and your weekly assignment sheet. • Correct core workbook p. 355 – 356 • Get started on Application 1 – What you do not finish is homework