Rectangle Area and Perimeter Worksheets

Free printable worksheets with answer keys. Pick a level, preview the questions, then open the sheet to swap or delete any single question.

Grade 3CCSS 3.MD.C.7 / 3.MD.D.8Answer key includedPDF · Print

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Easy: Area by counting unit squares

Preview shows 6 of 12 questions. Every sheet is new; open it to change any question.

Worksheet variations

Area counts the unit squares inside a rectangle: rows times squares in each row, or length × width. Perimeter is the distance around: add all four sides. Area is in square units; perimeter is in plain units.

EasyArea by counting unit squares MediumArea or perimeter HardMissing side from the area or perimeter

How to solve it: a worked example

Find the area, perimeter or missing side. Include units.

Start
5 rows of 3 squares
Answer

Common mistakes to watch for

Adding two sides for the perimeter instead of all four.
Mixing up area and perimeter, or writing cm for an area.
For a missing side from the perimeter, dividing by 4 or subtracting from the whole perimeter.

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