Area of Rectangles Using Arrays

Jaheim says you can create three rectangles with different side lengths using 12 unit squares. Draw three different rectangles that have an area of 12.

Jax started to draw a grid inside the rectangle to find its area.

What sentence could you use to find the area of this rectangle?

• 5 units x 6 units = 30 square units

• 5 units x 5 units = 25 square units

• 5 units + 5 units = 10 units

• 6 units + 6 units + 5 units + 5 units + 22 units

What is the area of the figure shown?

______ square units

JBC Elementary School uses the design below for their swimming pool. Shapes A, B, and C are rectangles.

What multiplication sentence would be used to find the area of rectangle A?

3 meters x ______ meters = 21 square meters

JBC Elementary School uses the design below for their swimming pool. Shapes A, B, and C are rectangles.

What multiplication sentence would be used to find the area of rectangle B?

3 meters x ______ meters = 30 square meters

JBC Elementary School uses the design below for their swimming pool. Shapes A, B, and C are rectangles. What multiplication sentence would be used to find the area of rectangle C? 10 meters x ______ meters = 60 square meters

What is the total area of the pink model?

• 3 units squared

• 4 units squared

• 7 units squared

• 12 units squared

What is the area of the rectangle?

• 15 square centimetres

• 18 square centimetres

• 21 square centimetres

• 22 square centimetres

What is the area of the shaded figure? 

• 4 square units 

• 6 square units 

• 10 square units 

• 2 square units 

Calculate the area of the shape below.

• 16 cm²

• 24 cm²

• 18 cm²

• 30 cm²