### Home > MC2 > Chapter 9 > Lesson 9.3.1 > Problem 9-81

9-81.

Find the missing side lengths of each rectangle (a and c) or square (b and d). Homework Help ✎

a. | b. | c. | d. |

To find the area of a rectangle, multiply the length

by the width.

100 cm ( x cm ) = 500 cm^{2}

Solve for x.

See (a).

16.4 cm

Recall the properties of a square. All the side lengths must be equal.

Since one side is already given, we can conclude that the other side is also 8 cm.

See (b).