About Area & Perimeter

Question

Rectangle has an area of 45 square feet.What is the missing measure?show your work.

?ft.

5ft⬛.

Answer 1

Hello Cearra,

It looks like your rectangle has one dimension given: 5 ft.

The formula for area of a rectangle is: A = L x W

You know A = 45 square feet, and you know one side is 5 ft so you can plug those numbers in the formula:

45 = L x 5

Divide both sides by 5 to solve for L: 45/5 = L so 9 = L

The missing measure in the rectangle is equal to 9 feet.