### Home > CC3 > Chapter 7 > Lesson 7.2.1 > Problem 7-40

7-40.

The trapezoids at right are similar shapes. Homework Help ✎7-40. What is the scale factor between shape B and shape A?

Find the lengths of the missing sides.

What is the ratio between the pair of sides 50 m and 30 m?

Use this ratio with each other pair of sides with one given length to solve for the variable.

*x* = 9 m

If *x* is 9 m, what would *y* be?