Finding the Perimeter Lesson

Find the perimeter of the following figure.

Find the perimeter of the following figure.

Benjamin builds a fence in the

shape of a triangle. Each side of

the fence is the same length. If the

perimeter is 36 feet, how long is

each side of the fence?

• 6 feet

• 12 feet

• 9 feet

• 18 feet

Anton puts a rail around his patio.

The patio is in the shape of a

rectangle with side lengths of 7 feet

and 9 feet. What is the perimeter of

Anton’s patio?

• 16 feet

• 63 feet

• 22 feet

• 32 feet

Alexander makes this name plate

from wood in art class. What is the

perimeter of the name plate?

• 18 cm

• 9 cm

• 3 cm

• 6 cm

Sally is putting frosting around the edges of the

roof of a gingerbread house. What is the perimeter

of the roof?

• 18 cm

• 16 cm

• 8 cm

• 20 cm

Kyle is adding a border to his triangular flag.

What is the perimeter of the flag?

• 2 inches

• 6 inches

• 3 inches

• 1 inch

Multi-step:

Pete glues a rope around his rectangular rodeo sign. His sign has side lengths of 2 feet and 3 feet. The rope costs $4 for each foot. How much does Pete pay for rope?

• $24

• $20

• $10

• $40

Austin’s class is making a poster for

Earth Day. What is the perimeter of

the poster?

• 24 feet

• 21 feet

• 15 feet

• 30 feet

Multi-step:

Iris sews a border around a blanket. The blanket has side lengths that are 4 feet and 6 feet. The border material costs $2 for each foot. How much does Iris pay for the border?

• $20

• $12

• $40

• $16