3rd grade CFA - Applying Operations to Area and Perimeter

What is the area of this blanket?

• 3 square feet

• 13 square feet

• 26 square feet

• 40 square feet

Each small square has an area of 1 square foot.

Which expression could be used to find the area of the shaded rectangle, in square feet?

• 4 + 4 + 4 + 4

• 4 x 4

• 4 + 6

• 4 x 6

A 5 by 6 rectangle is shown. Part of the rectangle is shaded.

Which of the following shows a way to find the total area of the shaded and unshaded parts?

• (5+4) plus (5+2)

• (5x4) plus (5x2)

• (5x4) times (5x2)

• (5+6) times (5+6)

Which statement about these rectangles is true?

• Both rectangles have an area of 26 square units.

• Both rectangles have an area of 40 square units.

• Rectangle X has an area of 13 square units, and Rectangle Y has an area of 40 square units.

• Rectangle X has an area of 40 square units, and Rectangle Y has an area of 28 square units.

The area of the front of a milk carton is 20 square inches.

Which could be the length and width of the milk carton?

• 5 inches and 4 inches

• 10 inches and 4 inches

• 10 inches and 10 inches

• 20 inches and 2 inches

Harrison used square tiles to make a different rectangle. Harrison’s rectangle has the same area as Gabrielle’s rectangle. Which measurements describe a rectangle with the same area as Gabrielle’s rectangle?

• 3 units long and 7 units wide

• 8 units long and 3 units wide

• 18 units long and 16 units wide

• 20 units long and 4 units wide

Carlos drew this rectangle. It has an area of 24 square inches.

What is the perimeter of Carlos’ rectangle?

• 10 inches

• 12 inches

• 20 inches

• 24 inches

What is the perimeter of this pentagon?

• 30 inches

• 35 inches

• 40 inches

• 60 inches

The perimeter of this trapezoid is 48 inches.

What is the missing length?

• 8 in.

• 10 in.

• 12 in.

• 14 in.

Which triangle has the same perimeter as the one shown?

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