Perimeter: 3rd Grade

Front

What is perimeter?

Back

Perimeter is the total distance around the outside of a shape.

Front

How do you calculate the perimeter of a rectangle?

Back

Add the lengths of all four sides or use the formula: Perimeter = 2(length + width).

Front

What is the perimeter of a rectangle with a length of 10 feet and a width of 4 feet?

Back

Perimeter = 2(10 + 4) = 28 feet.

Front

If a square has a side length of 5 cm, what is its perimeter?

Back

Perimeter = 4 x side length = 4 x 5 cm = 20 cm.

Front

What is the perimeter of a triangle with sides measuring 3 cm, 4 cm, and 5 cm?

Back

Perimeter = 3 + 4 + 5 = 12 cm.

Front

What units are used to measure perimeter?

Back

Perimeter is measured in linear units such as feet, meters, or inches.

Front

If a rectangle has a perimeter of 30 feet and one side is 10 feet, what is the length of the other side?

Back

Perimeter = 2(length + width) => 30 = 2(10 + width) => width = 5 feet.

Front

What is the perimeter of a figure with sides measuring 2 cm, 3 cm, and 4 cm?

Back

Perimeter = 2 + 3 + 4 = 9 cm.

Front

How does changing the length of one side of a rectangle affect its perimeter?

Back

Changing the length of one side will change the perimeter, as perimeter depends on all sides.

Front

What is the perimeter of a rectangle with a length of 8 inches and a width of 6 inches?

Back

Perimeter = 2(8 + 6) = 28 inches.