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Geometry 4.2 107.notebook 1 October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In triangle ABC, if measure of angle A = 64 degrees and the measure of angle B = 71 degrees, what is the measure of angle C? 3. What property of angle congruence is illustrated by this statement? If A B and B C, then A C.

Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

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Page 1: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

1

October 07, 2014

Oct 05­07:36 PM

Oct 27­8:21 PM

Bell Work: 4.2 Apply Congruence and Triangles

1. When are two angles congruent?

2. In triangle ABC, if measure of angle A = 64 degrees and the measure of angle B = 71 degrees, what is the measure of angle C?

3. What property of angle congruence is illustrated by this statement?If    A           B and      B            C, then    A           C.

Page 2: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

2

October 07, 2014

Oct 27­8:22 PM

Announcements

­ Test corrections this week (Parent Signature)

­ Make­up tests for absent people.

Oct 27­8:22 PM

Pick out the congruent figures.

Page 3: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

3

October 07, 2014

Oct 30­9:59 AM

Congruent Figures: have same shape and 

size.

Oct 27­8:23 PM

4.2 Apply Congruence and Triangles Congruent Triangles and the Corresponding Parts

Corresponding Sides 

Corresponding Angles

Triangle Congruence Statement 

Page 4: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

4

October 07, 2014

Oct 30­9:59 AM

How do you prove that two triangles are congruent?

Oct 27­9:03 PM

Just given this statement, determine the corresponding sides and angles.

Corresponding Sides

 

Corresponding Angles

Page 5: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

5

October 07, 2014

Oct 27­9:05 PM

Write a congruence statement for the triangles.

Corresponding Angles

Corresponding Sides

 

Oct 27­9:06 PM

Page 6: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

6

October 07, 2014

Oct 27­9:06 PM

What does the congruence statement tell us?

Oct 27­9:08 PM

Page 7: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

7

October 07, 2014

Oct 27­9:08 PM

Third Angle Theorem: if two angles of one triangle are congruent to two angles of another triangle, then the third angles are also congruent.

Oct 27­9:10 PM

Find the measure of angle BDC.

Page 8: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

8

October 07, 2014

Oct 27­9:12 PM

Find the measure of angle DCN.    By definition of congruence, what additional information is needed to know that 

Oct 7­7:10 AM

How are you all feeling?

:(:|:)

Page 9: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

9

October 07, 2014

Oct 30­7:44 AM

Name the property

Oct 27­9:14 PM

PROOF OF THE DAYYYYYY!!!!

Page 10: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

10

October 07, 2014

Oct 30­7:43 AM

Oct 27­9:15 PM

Assignment 

Workbook page: 4.2#1­16 all 

Tear OUT pages 63 and 65

DUE TOMORROW!!!!!!!!

Page 11: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

11

October 07, 2014

Oct 6­8:09 AM

Oct 6­8:09 AM

Page 12: Bell Work: 4.2 Apply Congruence and Triangles · October 07, 2014 Oct 0507:36 PM Oct 278:21 PM Bell Work: 4.2 Apply Congruence and Triangles 1. When are two angles congruent? 2. In

Geometry 4.2 10­7.notebook

12

October 07, 2014

Oct 6­8:09 AM