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Presentation transcript:

Pg. 450

7-3 Proving Triangles Similar Students will prove the similarity of triangles using the stated assumptions provided by the AA postulate and the SAS and SSS  Theorems. 7-3 Proving Triangles Similar To use AA, SAS, and SSS similarity statements To use similarity to find indirect measurements

7-3 Quiz The following questions are designed to help you decide how well you understood today’s lesson. Please be sure to ask if there is one you miss and you don’t understand why! Record the number you get right on your portfolio sheet

The triangles are not similar. 1. State whether the triangles are similar. If so, write a similarity statement and the postulate or theorem you used. ∆ABC∆MNO; SSS ∆ABC∆MNO; SAS ∆ABC∆MNO; AA The triangles are not similar. Non-Response Grid

2. Explain why the triangles are similar. Then find the value of x. SSS Postulate; 10 AA Postulate; 10 SAS Postulate; 4 AA Postulate; 4 Non-Response Grid

3. Explain why the triangles are similar. Then find the value of x. SSS Postulate; 5 AA Postulate; 13 SAS Postulate; 13 AA Postulate; 5 Non-Response Grid

4. Michele wanted to measure the height of her school’s flagpole 4. Michele wanted to measure the height of her school’s flagpole. She placed a mirror on the ground 48 feet from the flagpole, then walked backwards until she was able to see the top of the pole in the mirror. Her eyes were 5 feet above the ground and she was 12 feet from the mirror. Using similar triangles, find the height of the flagpole to the nearest tenth of a foot. 25 ft. 38.4 ft. 20 ft. 55 ft. Non-Response Grid

5. ∆QRS∆TUV. What is the measure of V? Non-Response Grid

Be sure to RATE your understanding of the lesson Assignment: 7-3 p. 455-457 #8-34 even Be sure to RATE your understanding of the lesson 4-3-2-1-0 after you finish it AND give me 2 complete sentences as to why you rated yourself that way.