3rd Grade - Perimeter

Select the answer that describes how to calculate the perimeter of this rectangle.

• 3x8 plus 3x8

• 3x8

• 3+8 plus 3+8

Calculate the perimeter of the shape above.

• 45 m

• 28 m

• 48 m

• 32 m

The perimeter of this shape is 180 yards. Calculate the length of the missing side.

• 158 yards

• 338 yards

• 22 yards

• 14 yards

Look at the two rectangles. Choose the correct sentence.

• Rectangle A has a smaller perimeter than Rectangle B.

• Rectangle A has the same area as Rectangle B.

• Rectangle A has a greater perimeter than Rectangle B.

• Rectangle B has the same perimeter as Rectangle A.

The perimeter of a triangular field is 184 feet. One side is 42 feet and the second side is 71

feet. How long is the third side?

• 297 feet

• 142 feet

• 71 feet

• 113 feet

The rectangular garden at Troy Elementary School is represented in the figure below.

The perimeter of the garden is 122 yards. What is the length of the missing side in the figure?

• 84 yards

• 101 yards

• 80 yards

• 40 yards

Troy Elementary School builds another rectanglar garden with the same perimeter, but

the side length is different. Which of these could be the side lengths of the new

garden?

• 15 yards by 48 yards

• 14 yards by 47 yards

• 13 yards by 57 yards

• 14 yards by 58 yards