Question

30 POINTS!! PLEASE

A surveyor wants to determine the width of a river. She surveys the area and finds the following measures below.

She uses a pair of similar triangles, to help her find the answer.

Answer 1

D = 90 FT

Explanation:

40 / d = 20 / 45

cross multiply

45 × 40 = 20d

1800 = 20d

divide both sides by 20

1800 / 20 = 20d / 20

d = 90 ft