Example 3

To find the distance across a pond, Rita climbs a 30-foot observation tower on the shore of the pond and locates points

and

so that

is perpendicular to

. She then finds the measure of

to be 12 feet. What is the measure of

, the distance across the pond?

This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit www.walch.com for more information.

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