Tuesday, October 1st

1. What are the five congruence proofs for triangles?

2. Given ABC is similar to AKL, What is the perimeter of ABC?

Warm Up

K

L

B

CA 585 3

Important

Test TOMORROW

1. CW Answers 2. Study Guide

Answers

WhiteboardReview

Name the 5 congruent Postulates

SSSASA HL

AAS SAS

What 2 things must be true about similar

Triangles?

1. All corresponding angles are congruent

2. Corresponding side lengths are proportional

Are these Triangles similar? If so, name the

postulate.

Yes, AA

Name the 3 Similarity Postulates

SSSAA SAS

Statements Reasons1)  2)  3) B is the midpoint of  

4)  

5) DAEB DCBD  

AE CBAB CD

ED

,AE CB AB CD Given:B is the midpoint of .

Fill out the five reasons!

ED

What is the final Reason (Hint: postulate)

Given:and

bisects

XT

.SXR

What angles should be congruent if the ACE is similar to BCD?A

B

CDe

Find the Scale Factor (Similarity Ratio)

12 in

8 in

15 in

10 in

U

W

V X

Z

Y

7.5

5

8.4

6

FIND ZY

What is this postulate for similarity?

A

B C

D

E F

Prove that RST~ PSQ

R

S

T

P Q

12

4 5

15 SS

reflexive

5

20

4

16

1

4

1

4

1. Two sides are proportional

2. Included angle is congruent

SAS~

SAS~

Find x

Complete the congruence statement. _____ CBD

MHQ is congruent to KHDFIND DK

36

7

Share a side

Reason: ____________property

Vertical Angles

Reason: __________________are congruent

What is the length of XZ if AB is (2x + 4)

x z

A B

C

A 5 ft lady casts a shadow that is 22 ft long. Her son is standing next to her and casts a shadow that is 10 ft long. How tall is her son?