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Similar Triangles (Angles are Congruent)
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Similar Triangles
Two triangles are similar if their corresponding angles are congruent (equal) and the ratio of their corresponding sides are in proportion.
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Example: In a given ABC, DEBC and AD/DB = 5/7. If AC = 6.5 cm., find AE.
Solution: in ABC ,you have DE BC

5(6.5 - AE)= 7AE 
32.5 - 5AE = 7AE 
12AE = 32.5
AE = 2.70 cm.
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