### Home > GC > Chapter 7 > Lesson 7.1.4 > Problem 7-40

7-40.

In problem 7-37 you learned that the diagonals of a rhombus are perpendicular bisectors. If *ABCD* is a rhombus with side length 15 mm and if *BD* = 24 mm, then find the length of the other diagonal,

Make an accurate and well-labeled diagram of the situation.

Use the right triangle Δ*BCE* and the Pythagorean Theorem to solve for *x*.

*x* = 18 mm