1. Warm Up
Solve each of the following proportions. Describe the method you used.
1) 2)
3) 4)
10 minutes .
End

2. Answers
Solve each of the following proportions. Describe the method you used.
1) 2)
3) 4)
4.2 15 6
12.5 .

3. Similarity

4. Yes/No Game
1Y 2N 3N 4Y 5N 6N 7Y 8Y 9Y 10N 11Y 12N 13Y 14Y 15N 16N

5. Cut Out Activity
Resource Manager: Obtain a Cut Out worksheet, Resource page, ruler, protractor, and scissors for each member.
Time Keeper: Set your timer for 15 minutes
Reader/Recorder: Read each part out loud
Spy Monitor: Ask other tables or teacher if you’re stuck!

6. Similarity
Definition: Similar polygons are polygons having corresponding angles congruent and corresponding sides proportional.
You denote similarity by ~

7. Example
Are the following shapes similar? A D 20 16 5 4 E 3 F C 12 B

8. Example The following shapes are similar. Find the scale factor.
Solve for x.
Write a similarity statement M 21 S N 2
x-1 L T R 15 18 5 O P V U 8

9. Assessment
Homework