Section 5.3A: Similar Triangles

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Presentation transcript:

Section 5.3A: Similar Triangles Objectives: • Review Proportions. • Define similarity • Determine if two triangles are similar. • Use similarity to solve for parts of triangles.

Concept: Solving Proportions Review Ex: 2 is to 3 as x is to 48 To solve proportions we: 1. Cross multiply 3x = 96 2. Solve for x __ __ 3x = 96 3 3 x = 32

Concept: You Try!!! 3 x ____ = ____ 2 18 2x = 54 2 2 x = 27 3 is to 2 as x is to 18. 3 x ____ = ____ 2 18 Now cross multiply 2x = 54 2 2 x = 27

Concept: What does “Similar” mean?