3rd Grade: Area and Perimeter

Front

What is the definition of 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: P = 2(length + width).

Tags

CCSS.4.MD.A.3

Front

What is the definition of area?

Back

Area is the amount of space inside a shape, measured in square units.

Front

How do you calculate the area of a rectangle?

Back

Multiply the length by the width: A = length × width.

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

What is the perimeter of a square with each side measuring 5 cm?

Back

20 cm (P = 4 × side length).

Tags

CCSS.4.MD.A.3

Front

If a rectangle has a length of 10 cm and a width of 4 cm, what is its area?

Back

40 square cm (A = length × width).

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

What is the formula for the perimeter of a triangle?

Back

P = side1 + side2 + side3.

Tags

CCSS.3.MD.D.8

Front

If the perimeter of a rectangle is 30 cm and the length is 10 cm, what is the width?

Back

5 cm (P = 2(length + width) => 30 = 2(10 + width)).

Tags

CCSS.4.MD.A.3

Front

What is the area of a rectangle with a length of 8 units and a width of 3 units?

Back

24 square units (A = length × width).

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

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

Back

12 cm (P = 3 + 4 + 5).

Tags

CCSS.3.MD.D.8