Perimeter of a Rectangle or Square Using a Formula

Find the perimeter of a square that has a length of 6 in.

• 12 in.

• 24 in.

• 20 in.

• 16 in.

Farmer Bob needs to build a fence for his chickens.  The area he wants to build a fence around is 40 feet long and 20 feet wide.  How many feet of fence does he need to buy?

• 800 feet

• 120 feet

• 60 feet

Find the PERIMETER of this figure.

• 20 square feet

• 20 cm

• 25 square feet

• 20 cm sq.

Which formula(s) could be used to find the perimeter of this rectangle?

• a + b + a + b = perimeter

• 2(a) + 2(b) = perimeter

• a x b = perimeter

• 2(a+b) = perimeter

Use the formula P=2L+2W to solve. If the perimeter of a rectangle is 30 cm and the width is 5 cm, what is the length?

• 20 cm

• 25 cm

• 10 cm

• 15 cm

Identify the formula

• Area of a rectangle

• Perimeter of a triangle

• Perimeter of a rectangle

• Area of a circle

If the perimeter of a rectangle is 60 cm and its length is 20 cm, what is its width?

• 10 cm

• 15 cm

• 20 cm

• 25 cm

The perimeter of a rectangle is 34m. The width of this rectangle is 4m. What is the length?

• 30m

• 13m

• 26m

• 12cm

Farmer Bob's son built a track to walk his pet pig.  The track goes around the pig pen.  The pig pen is 15 feet long and 21 feet wide.  If the pig walks all the way around the track, how many feet did he walk?

• 72 feet

• 36 feet

• 36 square feet

What is the perimeter of this rectangle?

• 21 units

• 12 units

• 3 units

• None of the above.