Perimeter with Missing Lengths

Find the missing side length! What is the perimeter?

If the perimeter of the shape is 34 units, what is the missing side?

Ray found the perimeter of the window in his bedroom to be 12 feet. If the length of the window is 4 feet long, what is the width?

Emilia is painting a triangular picture frame. The perimeter is 30 inches. If one side is 13 inches long and another side is 5 inches long, what is the length of the other side of the picture frame?

The perimeter of a square is 36 meters. What is the length of one side?

• 6 meters

• 9 meters

• 12 meters

• 18 meters

If the perimeter of a rectangle is 50 metres and the length is 15 metres, what is the width?

• 5 metres

• 10 metres

• 15 metres

• 20 metres

If the perimeter of an equilateral triangle is 21 cm, what is the length of one side?

• 7 cm

• 14 cm

• 21 cm

• 3 cm

A square garden has a perimeter of 48 meters. What is the length of one side of the garden?

• 12 meters

• 24 meters

• 8 meters

• 16 meters

The perimeter of an equilateral triangle is 18 metres. What is the length of one side?

• 3 metres

• 4 metres

• 5 metres

• 6 metres

The perimeter of an equilateral triangle is 18 inches. What is the length of one side?

• 4 inches

• 5 inches

• 6 inches

• 9 inches