Homework Help: geometry

Posted by Karen on Tuesday, July 3, 2012 at 3:15pm.

In triangle ABC, DE is parallel to AC. Side AD measures 5.3 units, side DB measures 8.0 units, and DE measures 4.8 units. What is the measure of AC?

geometry - Steve, Tuesday, July 3, 2012 at 4:23pm
by similar triangles,

AC/AB = DE/DB
AC/(5.3+8.0) = 4.8/8.0
AC = 7.98

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