5.3 similar triangles, aa, sas, sss.notebook · 2015. 12. 2. · similarity properties: aug 51:58...

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5.3 Similar triangles, AA, SAS, SSS.notebook 1 December 02, 2015 Aug 51:58 PM 5.3 Similar triangles AA, SAS, SSS I CAN... Identify and list corresponding angles and proportional sides of similar triangles Aug 51:58 PM Aug 51:58 PM AngleAngle (AA) Similarity Postulate Similar symbol: Similarity statement: Aug 51:58 PM Determine whether the triangles are similar. If so, write a similarity statement and explain your reasoning. X S R W T L K J P M Q 57 O 48 O 57 O 75 O 1. 2. Aug 51:58 PM SideSideSide (SSS) Similarity Postulate SideAngleSide (SAS) Similarity Postulate Aug 51:58 PM In the figure, OW = 7, BW = 9, WT = 17.5, and WI = 22.5. Determine which triangles in the figure are similar.

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Page 1: 5.3 Similar triangles, AA, SAS, SSS.notebook · 2015. 12. 2. · Similarity Properties: Aug 51:58 PM Aug 51:58 PM Determine if the triangles are similar. If so, solve for x and y

5.3 Similar triangles, AA, SAS, SSS.notebook

1

December 02, 2015

Aug 5­1:58 PM

5.3 Similar triangles AA, SAS, SSS

I CAN...Identify and list corresponding angles and proportional sides of similar triangles

Aug 5­1:58 PM

Aug 5­1:58 PM

Angle­Angle (AA) Similarity Postulate

Similar symbol: 

Similarity statement: 

Aug 5­1:58 PM

Determine whether the triangles are similar.  If so, write a similarity statement and explain your reasoning.

X

S

R

W

T

L K

J

P

M

Q

57O

48O

57O

75O

1. 2.

Aug 5­1:58 PM

Side­Side­Side (SSS) Similarity Postulate

Side­Angle­Side (SAS) Similarity Postulate

Aug 5­1:58 PM

In the figure, OW = 7, BW = 9, WT = 17.5, and WI = 22.5. 

Determine which triangles in the figure are similar.

Page 2: 5.3 Similar triangles, AA, SAS, SSS.notebook · 2015. 12. 2. · Similarity Properties: Aug 51:58 PM Aug 51:58 PM Determine if the triangles are similar. If so, solve for x and y

5.3 Similar triangles, AA, SAS, SSS.notebook

2

December 02, 2015

Aug 5­1:58 PM

Similarity Properties:

Aug 5­1:58 PM

Aug 5­1:58 PM

Determine if the triangles are similar.  If so, solve for x and y.

Aug 5­1:58 PM

Aug 5­1:58 PM

A lighthouse casts a 128­foot shadow. A nearby lamppost that measures 5 feet 3 inches casts an 8­foot shadow. 

A. 5 feet 3 inches is 5.___________ feet. 

B. Write a proportion that can be used to determine the height of the lighthouse. 

C. What is the height of the lighthouse? 

Aug 5­1:58 PM

INDIRECT MEASUREMENT  Josh wanted to measure the height of the Sears Tower in Chicago. He used a 12­foot light pole and measured its shadow at 1 P.M. The length of the shadow was 2 feet. Then he measured the length of the Sears Tower’s shadow and it was 242 feet at that time. What is the height of the Sears Tower?