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62 Properties of Parallelograms 1 January 07, 2010 Jan 412:01 PM 62 Properties of Parallelograms Objective Use relationships among sides, angles, and diagonals of parallelograms.

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Page 1: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

1

January 07, 2010

Jan 4­12:01 PM

6­2 Properties of Parallelograms

ObjectiveUse relationships among sides,

 angles, and diagonals of parallelograms.

Page 2: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

2

January 07, 2010

Jan 4­12:05 PM

6­1 Review

Attachment

Page 3: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

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January 07, 2010

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Warm­Up

E

F

H

G

2. Which sides of the parallelogram are    congruent?

3.  Which angles of the parallelogram are     congruent?

Use the figure at the right.1. Name the postulate or theorem that     justifies the congruence ΔEFG ≅ ΔGHE.

Page 4: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

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Jan 4­12:28 PM

F

H

G

E

A PARALLELOGRAM is a quadrilateral with opposite sides parallel.

Page 5: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

5

January 07, 2010

Jan 4­12:44 PM

Which property of parallelograms would you use to solve for x?

Then solve for x.

Example #1

Page 6: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

6

January 07, 2010

Jan 4­12:45 PM

Which property of parallelograms would you use to solve for y?

Then solve for y.

Example #2

Page 7: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

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January 07, 2010

Jan 4­1:23 PM

F

H

G

E

Given parallelogram EFGH, what will    F and    E add up to?

Example #3

Page 8: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

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January 07, 2010

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Third Property of Parallelograms

A1

2

3

B

D

E

4C

Prove Theorem 6­3Given:  

 Prove:

Statements Reasons

Page 9: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

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January 07, 2010

Jan 4­12:49 PM

Solve for a and z.4z

125a ­ 4a + 1

2F

H

G

E

Example #4

Page 10: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

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January 07, 2010

Jan 4­12:49 PM

Example #5

Solve for x and y.

Page 11: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

6­2 Properties of Parallelograms

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January 07, 2010

Jan 4­1:09 PM

Homework

Pg. 315

#1, 2, 7­10, 12, 15, 16, 38, 46

Page 12: 6-2 Properties of Parallelograms - Poudre School Districtstaffweb.psdschools.org/kemotich/Mrs_Motichka... · 62 Properties of Parallelograms 3 January 07, 2010 Jan 412:08 PM WarmUp

Attachments

shapemakers[1].gsp