Grade 3 - Math

Grade 3 Area and Perimeter Worksheet

6 printable versions - On Level - About 8 minutes each

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Area and Perimeter

Grade 3 - Math - On Level

Worksheet 1

  1. A rectangle is 5 units long and 4 units wide. What is its area?

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  2. A rectangle is 4 units long and 8 units wide. What is its perimeter?

  3. A rectangle measuring 11 by 7 needs square tiles inside it. Which measurement should be found?

  4. A border goes around a rectangle measuring 11 by 4. Which measurement should be found?

  5. A tiled rectangle covers 21 square units in 3 equal rows. How many tiles are in each row?

  6. A rectangle is 8 units long and 9 units wide. What is its area?

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  7. A rectangle is 9 units long and 9 units wide. What is its perimeter?

  8. A rectangle measuring 8 by 7 needs square tiles inside it. Which measurement should be found?

  9. A border goes around a rectangle measuring 12 by 4. Which measurement should be found?

  10. A tiled rectangle covers 25 square units in 5 equal rows. How many tiles are in each row?

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About this worksheet

Area and perimeter are often confused because both describe rectangles and both use measurements. Area counts square units covering the inside of a shape, while perimeter measures the distance around the outside. Third graders may multiply when the question asks for the border, or add all sides when the question asks for covering space. This worksheet keeps the distinction visible. Students find area from rows and columns, find perimeter from side lengths, choose which measurement a situation needs, solve missing-side problems, and compare two rectangles. Array visuals support area, while measurement prompts name side lengths for perimeter. Support versions use smaller rectangles. Standard and challenge versions include larger values and missing measures. Encourage your child to ask inside or around before calculating.

What your child will learn

  • Find area by multiplying side lengths
  • Find perimeter by adding side lengths
  • Choose area or perimeter for a situation
  • Solve missing rectangle measures

Worked example

A 4 by 6 rectangle has area 24 square units and perimeter 20 units.

Common mistake

Using multiplication for every rectangle question without checking whether it asks for area or perimeter.

Helpful hint

Area is inside. Perimeter is around.

Fractions of a Set

Questions parents ask

What is the most common mistake with area and perimeter?
Using multiplication for every rectangle question without checking whether it asks for area or perimeter.
How can I help my child with area and perimeter?
Area is inside. Perimeter is around.
Are these 3rd grade math worksheets free to print?
Yes. All 6 printable versions on this page are free to download and print, with no account needed.

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