Question

An engineer wanted to approximate the width, in feet (ft), of a river. She placed markers at point A and point B to represent the average width of the river. She also placed 3 other markers along the riverbank and measured the distances shown in the diagram below..Based on this diagram, what was the width of the river, in feet (ft), from point A to point B?
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Answer 1

First prove two triangles are similar

Answer 2

right triangles

Answer 3

got it?

Answer 4

and how do i prove exactly