Area and Perimeter

Front

What is the perimeter of a shape?

Back

The 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 formula for the perimeter of a square?

Back

Perimeter = 4 × side length.

Front

If one side of a triangle is 5 cm, another is 7 cm, and the last is 8 cm, what is the perimeter?

Back

The perimeter is 5 cm + 7 cm + 8 cm = 20 cm.

Front

What is area?

Back

Area is the amount of space inside a shape.

Front

How do you calculate the area of a rectangle?

Back

Area = length × width.

Front

What is the formula for the area of a square?

Back

Area = side length × side length.

Front

If a rectangle has a length of 4 cm and a width of 3 cm, what is its area?

Back

Area = 4 cm × 3 cm = 12 square cm.

Front

What is the difference between area and perimeter?

Back

Area measures the space inside a shape, while perimeter measures the distance around it.

Front

If a shape has a perimeter of 30 cm and three sides are 10 cm, 10 cm, and 5 cm, what is the length of the unknown side?

Back

The unknown side is 5 cm.