Perimeter

Front

What is the perimeter?

Back

The perimeter is the total distance around the outside of a shape.

Front

What is the formula for finding the perimeter of a rectangle?

Back

Perimeter = 2(length + width)

Front

If a rectangle has a length of 10 cm and a width of 5 cm, what is its perimeter?

Back

Perimeter = 2(10 cm + 5 cm) = 30 cm.

Front

What is the perimeter of a square with a side length of 4 cm?

Back

Perimeter = 4 x side length = 4 x 4 cm = 16 cm.

Front

How do you find the missing measurement if you know the perimeter?

Back

Subtract the known measurements from the total perimeter to find the missing measurement.

Front

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

Back

Perimeter = 2(40 ft + 20 ft) = 120 ft.

Front

What is the perimeter of a triangle with sides measuring 5 cm, 7 cm, and 9 cm?

Back

Perimeter = 5 cm + 7 cm + 9 cm = 21 cm.

Front

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

Back

Width = (Perimeter/2) - Length = (50 cm/2) - 15 cm = 10 cm.

Front

What is the perimeter of a circle called?

Back

The perimeter of a circle is called the circumference.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.