1. Kayla wants to find the width, AB, of a river. She walks along the edge of the river 100 ft and marks point C. Then she walks 22 ft further and marks point D. She turns 90° and walks until her location, point A, and point C are collinear. She marks point E at this location, as shown. Suppose DE = 32 ft. How can you find the distance across the river? Suppose DE = 32 ft. What is the distance across the river?