AMC / AIME · Similar Triangles · Easy

Similar Triangles: In similar triangles, math, math, and math correspond. Find math.

AA and ratios.

Try the problem

In similar triangles, AB=6AB=6, DE=10DE=10, and EF=15EF=15 correspond. Find BCBC.

Hint and answer

Concept to use

AA recognition.

Hint

Match corresponding sides and use one scale factor.

Answer

9

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