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Integrated Math 4
Day 32
7.4 Postulates for Similar Triangles
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Daily Openers
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Go over and collect homework
7.4 Postulates for Similar Triangles
A-A Similarity Postulate (Postulate 15)
If two angles of a  are  to two angles of another , then the
two ’s are similar ().
Ex. Are the ’s similar?
Ex. Are the ’s similar?
Ex. Are the ’s similar?
Ex. Are the ’s similar?
S-S-S Similarity Postulate (Postulate 16)
If the corresponding sides of two ’s are proportional, then the two
’s are similar ().
Ex. Is either DEF or GHJ similar to ABC
S-A-S Similarity Postulate (Postulate 16)
If an angle of one  is  to an  in another , and the two
sides that include that  are proportional to the corresponding
sides in the other , then the two ’s are similar ().
Ex. Explain how to show that the indicated ’s are .
Ex. Which of the three ’s are ? Write a similarity statement.
Homework – pages 312–313 #1–26
8 n
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n 18
5n 10n  16
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2. Solve:
4
6
Daily Openers – 1. Solve:
3. Find the lengths of the missing sides.
4. Find the length of the missing side.
5. Write an equation for the line passing through the points: (-4, 6) and (2, -3)