Area and Perimeter

Area and Perimeter

Perimeter

• The distance around a shape

• To find the perimeter of a polygon, add the length of each of its sides

Multiple Choice

What is the perimeter of this figure?

• 2 inches

• 3 inches

• 6 inches

• 12 inches

Area

• The amount of surface inside a shape

• To find area you can tile the shape and count the square units

• You can also multiply the length of the shape by the width of the shape

Multiple Choice

What is the area of this figure?

• 24 square units

• 35 square units

• 40 square units

• 12 square units

Rectilinear Figures

• Rectilinear shapes are formed with right angles (like rectangles and squares.) Some rectilinear shapes have more than 4 sides.

• To find the area, decompose the shape into smaller rectangles. Find the area of each rectangle. Add the areas together.

Multiple Choice

What is the area of this figure?

• 28 square inches

• 40 square inches

• 26 square inches

• 10 square inches

Word Problems

Area and perimeter can be used to solve real world problems.

Multiple Choice

Joe wants to build a fence around his yard. His yard is 10 yards wide by 8 yards long. How much fencing will Joe need?

• 36 yards

• 80 yards

• 40 yards

• 18 yards

Multiple Choice

Addy wants to paint her bedroom wall. The wall is 10 ft high by 8 ft wide. What is the area of the wall she wants to paint?

• 18 square feet

• 36 square feet

• 80 square feet

• 100 square feet

Multiple Choice

The farmer needs to cover with soil a garden that measures 6m by 5m. Each bag of soil covers 10 square meters. How many bags of soil will he need?

• 30 bags

• 11 bags

• 3 bags

• 22 bags