Area of Rectangles and Squares with Missing Side

Use the distributive property to write the equation that represents the picture.

Find the area.

• 24 square inches

• 46 square inches

• 28 square inches

• 49 square inches

John draws this rectangle. Which explanations are correct to find the area?

• John should add 5 + 4. His area is 9 in.

• John can draw in 5 rows and 4 columns. He can count all the squares. His area is 20 square inches.

• John can break the shape into 2 parts. He can do (3x2) + (4x2) and find the area of 14 square in.

• John can do 5 x 4 because a rectangle is an array. He can multiply length times width because it is another way to say rows times columns. His area is 20 square inches.

Tony has a square garden. One of the sides is 7 yards long. What is the area of his garden?

• 14 square yds

• 28 square yds

• 49 square yds

• I don't have enough information to find the area of this shape.

Find the area.

• 24 square cm

• 28 square cm

• 32 square cm

• 36 square cm

The length of a rectangle is 9 feet.

Tell what the area would be if the width was:

8 feet?

6 feet?

2 feet?

• 72 sq. feet, 45 sq. feet, 19 sq. feet

• 72 sq. feet, 54 sq. feet, 18 sq. feet

• 63 sq, feet, 54 sq. feet, 18 sq. feet

• 72 sq. feet, 54 sq. feet, 16 sq. feet

Find the area.

What is the missing side length AND area?

• 1cm, 20 sq. cm

• 2 cm, 26 sq. cm

• 4 cm, 26 sq. cm

Which of these shows how to find the area of the blue shape?

• Multiply, 8 x 5 = 40. The blue area is 40 sq cm.

• Multiply, 8 x 5 = 40 for the entire space. Then, multiply 2 x 3 = 6 to find the white rectangle. Add the white area, 6 sq cm, to the entire outside space area of 40 sq cm. The answer is 46 square cm.

• Multiply, 8 x 5 = 40 for the entire space. Then, multiply 2 x 3 = 6 to find the white rectangle. Subtract the white area, 6 sq cm, from the entire outside space area of 40 sq cm. The answer is 34 square cm.

Look at the door. What area is NOT glass?

• 4 sq. ft

• 13 sq. ft

• 32 sq. ft

• 34 sq. ft

• 36 sq. ft