9.1 Formulas for Area and Perimeter

Apply

Tina is fixing a rectangular sign. She plans to place metal trim around the sign edges. The rectangle measures 32 inches by 9 inches. How much trim will Tina need?

• 36 inches

• 41 inches

• 72 inches

• 82 inches

A rectangle has a length of 5 meters and a width of 4 meters. Which equation can you use to find the perimeter?

• P = 4 × 5

• P = 4 × 4

• P = 4 + 4 + 5 + 5

• P = 4 + 5

Multi-Step

Lana had an “L” shaped piece of felt. Her mom cut it into two rectangles. One rectangle measured 4 inches by 9 inches, and the other measured 4 inches by 3 inches. What is the total area of the two rectangles?

• 40 square inches

• 48 square inches

• 72 square inches

• 24 square inches

Mai wants to tile the floor of her kitchen. Each tile has an area of 1 square foot. The floor of her kitchen is 11 feet by 16 feet. How many tiles does she need?

• 150

• 54

• 176

• 352

Find the perimeter.

• 72 feet

• 289 feet

• 315 feet

• 68 feet

Find the perimeter.

• 72 square feet

• 289 square feet

• 315 square feet

• 68 square feet

A rectangle has a perimeter of 68 inches. If the width of the rectangle is 10 inches, what is the length of the rectangle?

• 10

• 18

• 24

• 17

A square has an area of 81 square feet. What is the length of each side of the square?

• 2

• 9

• 18

• 4

Lea wants to put a fence around her garden. Her garden measures 14 feet by 15 feet. She has 50 feet of fencing. How many more feet of fencing does Lea need to put a fence around her garden?

• 7

• 6

• 8

• 14

Lea wants to put a new layer of soil on her 14 feet by 15 feet garden. She finds the area of her garden so she knows how much soil to buy. If one bag of soil covers 20 square feet, how many bags of soil will Lea need?

• 10

• 9

• 11

• 12