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