Similar Triangles

Similar Triangles

• Similar triangles have the same shape, but not necessarily the same size.

• Two main tests for similarity:

1) If the angles of 1 triangle and the corresponding angles of a 2 triangle have equal measures, then the triangles are similar

2) If the measures of the sides of 2 triangles form equal ratios, or are proportional, then the triangles are similar

Similar Triangles

• If 2 triangles are similar, then the measures of their corresponding sides are proportional, and the measures of their corresponding angles are equal.

Similar Triangles?

Find missing measures

Find Missing Measures

• Jenelle is standing near the Washington Monument in Washington, D.C. The shadow of the monument is 302.5 ft, and Jenelle’s shadow is 3 ft. If Jenelle is 5.5 ft tall, how tall is the monument?

Practice

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