To find the distance across a pond, Rita climbs a 30-foot observation tower on the shore of the pond and locates points [math]A[/math] and [math]B[/math] so that [math]\overline{AC}[/math] is perpendicular to [math]\overline{CB}[/math]. She then finds the measure of [math]\overline{DB}[/math] to be 12 feet. What is the measure of [math]\overline{AD}[/math], the distance across the pond?
[list=1] [*]Determine if the triangles are similar. [*]Solve the problem. [/list] This applet is provided by Walch Education as supplemental material for the [i]CCGPS Analytic Geometry[/i] program. Visit [url="http://www.walch.com"]www.walch.com[/url] for more information on our resources.