Perimeter of Unknown Side

Find the unknown side length if the perimeter is 89 inches.

• 15 in.

• 17 in.

• 20 in.

• 13 in.

This shape has a missing side length labeled with a letter. The perimeter of the shape is labeled inside. Find the unknown side length for each shape.

What is the perimeter?

• 12 feet

• 16 feet

• 14 feet

• 10 feet

The distance around an object is called the 

• area

• perimeter

This shape has a missing side length labeled with a letter. The perimeter of the shape is labeled inside. Find the unknown side length for each shape.

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

• 5 cm

• 4 cm

• 8 cm

• 10 cm

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

• 10 cm

• 6 cm

• 8 cm

• 7 cm

Find the unknown side length if the perimeter is 89 inches.

• 15 inches

• 17 inches

• 20 inches

• 13 inches

All professional baseball teams’ playing fields are the same size. The three bases and home plate make a diamond that is 90 feet on each side. What is the perimeter of the diamond?

• 360 feet

• 400 feet

• 320 feet

• 300 feet

What is the perimeter of this shape?

• 24 cm

• 18 cm

• 12 cm

• 30 cm