# CCSS IP Math II 5.3.4 Example 3

- Author:
- Walch Education

- Topic:
- Similar Triangles, Triangles

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?