Perimeter of Rectangles and Triangles

The distance around an object is called the 

• area

• perimeter

What is the perimeter of this rectangle?

• 21 units

• 12 units

• 3 units

• None of the above.

What is the perimeter of this rectangle?

• 5 cm

• 12 cm

• 16 cm

• 20 cm

What is the perimeter of this rectangle?

• 24 feet

• 36 feet

• 20 feet

• 40 ft

The distance around the outside of an object is called the...

• area

• length

• perimeter

• width

What is the perimeter of this triangle?

• 26 m

• 32 m

• 17 m

• 14 m

What formula do we use to find the perimeter of a triangle?

• P = 2l + 2w

• P= a + b + c

What formula do we use to find the perimeter of a rectangle?

• P= a + b + c

• P = 2l + 2w

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

Find the perimeter of the rectangle.

• 50 in.

• 25 in.

• 45 in. 

• 100 in.