SlideShare a Scribd company logo
8.4 Special Quadrilaterals

January 27, 2014

Tell how you know that the quadrilateral is a parallelogram.
1.The diagonals bisect each other.

2. Both pairs of opp <s   opp sides //. Def of //ogram
≅ ∴
80
80

100

3. For what value of x is the quadrilateral a parallelogram?  50
2x

x + 30

Bellwork

Dec 22­8:40 AM

HW pg. 537 #3­51 multiples of 3

1
8.4 Special Quadrilaterals

January 27, 2014

8.4 Special Quadrilaterals
Rectangle:
    w/ 
4 right <s

Rhombus:
 w/ 
4  ≅ sides

Square:
   w/
 4 sides  ≅ 
& 4 right <s

Rhombus Corollary: A quad is a rhombus iff it has 4 

≅ sides.

Rectangle Corollary:  A quad is a rectangle iff it has 4 right <s.
Square Corollary:  A quad is a square iff it is a rhombus and 
rectangle.

Parallelograms

Rhombuses

Rectangles
Squares

Dec 22­12:19 PM

HW pg. 537 #3­51 multiples of 3

2
8.4 Special Quadrilaterals

January 27, 2014

Dec 22­12:33 PM

HW pg. 537 #3­51 multiples of 3

3
8.4 Special Quadrilaterals

January 27, 2014

Dec 22­12:34 PM

HW pg. 537 #3­51 multiples of 3

4
8.4 Special Quadrilaterals

January 27, 2014

Theorem 8.11
A      is a rhombus iff its diagonals are   .

Theorem 8.12
A     is a rhombus iff each diagonal bisects a pair of 
opposite <s. 

Theorem 8.13
A     is a rectangle iff its diagonals are 

≅. 

Dec 22­12:34 PM

HW pg. 537 #3­51 multiples of 3

5
8.4 Special Quadrilaterals

January 27, 2014

Rewrite the theorem as a biconditional and prove it.

Theorem 8.11
A     is a rhombus iff its diagonals are   .
Conditional Statement
If the diagonals of a    are   , then it is a rhombus.
Converse

If the     is a rhombus, then its diagonals are   .

PROOF:
Questions to ask.
What do I know about //ograms?
What do I know about rhombuses?

Given: ABCD is a    ; AC   BD
Prove: ABCD is a rhombus.

A

B

X

D
Statements
1.  ABCD is a //ogram
2.  AC   BD

3.  <CXB & <DXC are right <s
4.  <CXB ≅ <DXC 
5.  AD  ≅ BC & DC  ≅ AB
6.  DX ≅ BX
7.  CX ≅ XC
8.  BXC ≅   DXC
9.  BC ≅ DC
10. AD   DC & BC   AB
≅
≅
11. ABCD is a rhombus

C
Reasons
1.  Given
2.  Given

3.  Def of   lines
4. Def of right <s
5.  Opp. sides of      are  ≅
6.  Diagonals bisect each other in 
7.  Reflexive Prop.
8.  SAS
9.  CPCTC
10.  Transitive Prop.
11.  Def of rhombus

Jan 3­9:08 AM

HW pg. 537 #3­51 multiples of 3

6
8.4 Special Quadrilaterals

January 27, 2014

Jan 3­11:34 AM

HW pg. 537 #3­51 multiples of 3

7
8.4 Special Quadrilaterals

January 27, 2014

8.4 
HW
pg. 537 
#3­51 multiples of 3

Jan 3­11:33 AM

HW pg. 537 #3­51 multiples of 3

8

More Related Content

Similar to 8.4 notes

Lesson 1.10 square roots
Lesson 1.10   square rootsLesson 1.10   square roots
Lesson 1.10 square roots
JohnnyBallecer
 
Quadrilaterals
QuadrilateralsQuadrilaterals
Quadrilaterals
Elangovan Mathavi
 
Week 6 - Parallelogram - PART 2.pptx
Week 6 - Parallelogram - PART 2.pptxWeek 6 - Parallelogram - PART 2.pptx
Week 6 - Parallelogram - PART 2.pptx
LeoOrtega19
 
8.4 notes
8.4 notes8.4 notes
Math 7 triangles and quadrilaterals
Math 7 triangles and quadrilateralsMath 7 triangles and quadrilaterals
Math 7 triangles and quadrilaterals
AlejandroBuhia
 
Geometry Section 6-5 1112
Geometry Section 6-5 1112Geometry Section 6-5 1112
Geometry Section 6-5 1112
Jimbo Lamb
 

Similar to 8.4 notes (6)

Lesson 1.10 square roots
Lesson 1.10   square rootsLesson 1.10   square roots
Lesson 1.10 square roots
 
Quadrilaterals
QuadrilateralsQuadrilaterals
Quadrilaterals
 
Week 6 - Parallelogram - PART 2.pptx
Week 6 - Parallelogram - PART 2.pptxWeek 6 - Parallelogram - PART 2.pptx
Week 6 - Parallelogram - PART 2.pptx
 
8.4 notes
8.4 notes8.4 notes
8.4 notes
 
Math 7 triangles and quadrilaterals
Math 7 triangles and quadrilateralsMath 7 triangles and quadrilaterals
Math 7 triangles and quadrilaterals
 
Geometry Section 6-5 1112
Geometry Section 6-5 1112Geometry Section 6-5 1112
Geometry Section 6-5 1112
 

More from Mrs. Hedrick's Class

Strafford Volleyball Apparel
Strafford Volleyball ApparelStrafford Volleyball Apparel
Strafford Volleyball Apparel
Mrs. Hedrick's Class
 
Ch 12 unit schedule
Ch 12 unit scheduleCh 12 unit schedule
Ch 12 unit schedule
Mrs. Hedrick's Class
 
Ch 10 unit schedule
Ch 10 unit scheduleCh 10 unit schedule
Ch 10 unit schedule
Mrs. Hedrick's Class
 
Ch 7 unit schedule
Ch 7 unit scheduleCh 7 unit schedule
Ch 7 unit schedule
Mrs. Hedrick's Class
 
Stockton Tournament Schedule 2015
Stockton Tournament Schedule 2015Stockton Tournament Schedule 2015
Stockton Tournament Schedule 2015
Mrs. Hedrick's Class
 
Lake Volley Fest
Lake Volley FestLake Volley Fest
Lake Volley Fest
Mrs. Hedrick's Class
 
Lake Volley Fest
Lake Volley FestLake Volley Fest
Lake Volley Fest
Mrs. Hedrick's Class
 
Volleyfest Schedule 2015
Volleyfest Schedule  2015Volleyfest Schedule  2015
Volleyfest Schedule 2015
Mrs. Hedrick's Class
 
2015 Branson Tournament Schedule
2015 Branson Tournament Schedule2015 Branson Tournament Schedule
2015 Branson Tournament Schedule
Mrs. Hedrick's Class
 
12.7 notes
12.7 notes12.7 notes
12.6 notes
12.6 notes12.6 notes
12.5 notes
12.5 notes12.5 notes
12.4 notes
12.4 notes12.4 notes
Indian volleyball tournament
Indian volleyball tournamentIndian volleyball tournament
Indian volleyball tournament
Mrs. Hedrick's Class
 
12.3 notes
12.3 notes12.3 notes
12.2 notes
12.2 notes12.2 notes
12.5 notes
12.5 notes12.5 notes
12.4 notes
12.4 notes12.4 notes
12.1 notes
12.1 notes12.1 notes
11.7 notes
11.7 notes11.7 notes

More from Mrs. Hedrick's Class (20)

Strafford Volleyball Apparel
Strafford Volleyball ApparelStrafford Volleyball Apparel
Strafford Volleyball Apparel
 
Ch 12 unit schedule
Ch 12 unit scheduleCh 12 unit schedule
Ch 12 unit schedule
 
Ch 10 unit schedule
Ch 10 unit scheduleCh 10 unit schedule
Ch 10 unit schedule
 
Ch 7 unit schedule
Ch 7 unit scheduleCh 7 unit schedule
Ch 7 unit schedule
 
Stockton Tournament Schedule 2015
Stockton Tournament Schedule 2015Stockton Tournament Schedule 2015
Stockton Tournament Schedule 2015
 
Lake Volley Fest
Lake Volley FestLake Volley Fest
Lake Volley Fest
 
Lake Volley Fest
Lake Volley FestLake Volley Fest
Lake Volley Fest
 
Volleyfest Schedule 2015
Volleyfest Schedule  2015Volleyfest Schedule  2015
Volleyfest Schedule 2015
 
2015 Branson Tournament Schedule
2015 Branson Tournament Schedule2015 Branson Tournament Schedule
2015 Branson Tournament Schedule
 
12.7 notes
12.7 notes12.7 notes
12.7 notes
 
12.6 notes
12.6 notes12.6 notes
12.6 notes
 
12.5 notes
12.5 notes12.5 notes
12.5 notes
 
12.4 notes
12.4 notes12.4 notes
12.4 notes
 
Indian volleyball tournament
Indian volleyball tournamentIndian volleyball tournament
Indian volleyball tournament
 
12.3 notes
12.3 notes12.3 notes
12.3 notes
 
12.2 notes
12.2 notes12.2 notes
12.2 notes
 
12.5 notes
12.5 notes12.5 notes
12.5 notes
 
12.4 notes
12.4 notes12.4 notes
12.4 notes
 
12.1 notes
12.1 notes12.1 notes
12.1 notes
 
11.7 notes
11.7 notes11.7 notes
11.7 notes
 

Recently uploaded

BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
Nguyen Thanh Tu Collection
 
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
PECB
 
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHatAzure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
Scholarhat
 
How to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 InventoryHow to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 Inventory
Celine George
 
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdfবাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
eBook.com.bd (প্রয়োজনীয় বাংলা বই)
 
C1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptx
C1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptxC1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptx
C1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptx
mulvey2
 
The simplified electron and muon model, Oscillating Spacetime: The Foundation...
The simplified electron and muon model, Oscillating Spacetime: The Foundation...The simplified electron and muon model, Oscillating Spacetime: The Foundation...
The simplified electron and muon model, Oscillating Spacetime: The Foundation...
RitikBhardwaj56
 
The basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptxThe basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptx
heathfieldcps1
 
MARY JANE WILSON, A “BOA MÃE” .
MARY JANE WILSON, A “BOA MÃE”           .MARY JANE WILSON, A “BOA MÃE”           .
MARY JANE WILSON, A “BOA MÃE” .
Colégio Santa Teresinha
 
Pride Month Slides 2024 David Douglas School District
Pride Month Slides 2024 David Douglas School DistrictPride Month Slides 2024 David Douglas School District
Pride Month Slides 2024 David Douglas School District
David Douglas School District
 
clinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdfclinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdf
Priyankaranawat4
 
How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17
Celine George
 
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptxChapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Mohd Adib Abd Muin, Senior Lecturer at Universiti Utara Malaysia
 
DRUGS AND ITS classification slide share
DRUGS AND ITS classification slide shareDRUGS AND ITS classification slide share
DRUGS AND ITS classification slide share
taiba qazi
 
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPLAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
RAHUL
 
Life upper-Intermediate B2 Workbook for student
Life upper-Intermediate B2 Workbook for studentLife upper-Intermediate B2 Workbook for student
Life upper-Intermediate B2 Workbook for student
NgcHiNguyn25
 
Digital Artifact 1 - 10VCD Environments Unit
Digital Artifact 1 - 10VCD Environments UnitDigital Artifact 1 - 10VCD Environments Unit
Digital Artifact 1 - 10VCD Environments Unit
chanes7
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
Nicholas Montgomery
 
RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3
RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3
RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3
IreneSebastianRueco1
 
How to Fix the Import Error in the Odoo 17
How to Fix the Import Error in the Odoo 17How to Fix the Import Error in the Odoo 17
How to Fix the Import Error in the Odoo 17
Celine George
 

Recently uploaded (20)

BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
 
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
 
Azure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHatAzure Interview Questions and Answers PDF By ScholarHat
Azure Interview Questions and Answers PDF By ScholarHat
 
How to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 InventoryHow to Setup Warehouse & Location in Odoo 17 Inventory
How to Setup Warehouse & Location in Odoo 17 Inventory
 
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdfবাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
বাংলাদেশ অর্থনৈতিক সমীক্ষা (Economic Review) ২০২৪ UJS App.pdf
 
C1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptx
C1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptxC1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptx
C1 Rubenstein AP HuG xxxxxxxxxxxxxx.pptx
 
The simplified electron and muon model, Oscillating Spacetime: The Foundation...
The simplified electron and muon model, Oscillating Spacetime: The Foundation...The simplified electron and muon model, Oscillating Spacetime: The Foundation...
The simplified electron and muon model, Oscillating Spacetime: The Foundation...
 
The basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptxThe basics of sentences session 6pptx.pptx
The basics of sentences session 6pptx.pptx
 
MARY JANE WILSON, A “BOA MÃE” .
MARY JANE WILSON, A “BOA MÃE”           .MARY JANE WILSON, A “BOA MÃE”           .
MARY JANE WILSON, A “BOA MÃE” .
 
Pride Month Slides 2024 David Douglas School District
Pride Month Slides 2024 David Douglas School DistrictPride Month Slides 2024 David Douglas School District
Pride Month Slides 2024 David Douglas School District
 
clinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdfclinical examination of hip joint (1).pdf
clinical examination of hip joint (1).pdf
 
How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17
 
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptxChapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
 
DRUGS AND ITS classification slide share
DRUGS AND ITS classification slide shareDRUGS AND ITS classification slide share
DRUGS AND ITS classification slide share
 
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPLAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
 
Life upper-Intermediate B2 Workbook for student
Life upper-Intermediate B2 Workbook for studentLife upper-Intermediate B2 Workbook for student
Life upper-Intermediate B2 Workbook for student
 
Digital Artifact 1 - 10VCD Environments Unit
Digital Artifact 1 - 10VCD Environments UnitDigital Artifact 1 - 10VCD Environments Unit
Digital Artifact 1 - 10VCD Environments Unit
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
 
RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3
RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3
RPMS TEMPLATE FOR SCHOOL YEAR 2023-2024 FOR TEACHER 1 TO TEACHER 3
 
How to Fix the Import Error in the Odoo 17
How to Fix the Import Error in the Odoo 17How to Fix the Import Error in the Odoo 17
How to Fix the Import Error in the Odoo 17
 

8.4 notes