Finding Unknown Side Length

A square garden has a perimeter of 100 feet.  What is the length of each side?

• 25 feet

• 50 feet

• 400 feet

• 100 feet

A rectangular swimming pool was 9 meters wide with an area of 90 square meters. What is the length?

• 180 sq. meters

• 180 meters

• 10 sq. meters

• 10 meters

An envelope is 3 inches wide with a perimeter of 30 inches. What is the length of the envelope?

• 90 inches

• 24 inches

• 12 inches

• 10 inches

The area of a rectangle is 49 sq. in.  One side length is 7 in.  What is the other side length?

• 9 in.

• 10 cm.

• 3 in.

• 7 in.

What multiplication problem helps you solve for L?

• 7 x 2 = 14

• 7 x 3 = 21

• 7 x 5 = 35

• 7 x 4 = 28

Find the unknown side length if the perimeter is 29 cm.

• 10 cm

• 8 cm

• 6 cm

• 7 cm

Find the unknown side length if the perimeter is 30 cm.

• 5 cm

• 4 cm

• 8 cm

• 10 cm

Perimeter= 16 feet

• 15 feet

• 4 feet

• 2 feet

• 7 feet

The perimeter is 40.  What is the length of the missing side?

• 12ft

• 10ft

• 3ft

• 24ft

What is the missing side length?

• 8 meters

• 7 meters

• 5 meters

• 6 meters