Question

Use a proportion or the Pythagorean Theorem to find y. If needed, estimate your answer to two decimal places.

Answer 1

y ≈ 17.32

Explanation:

The triangles are all similar, so you have ...

long-side/hypotenuse = y/(5+15) = 15/y

Cross-multiplying gives ...

y^2 = 15·20 = 300 . . . . . . . . take the square root to find y

y = √300 = 10√3 ≈ 17.32