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3rd Grade · Math

3rd Grade Area & Perimeter Worksheets

Before this skill

  • Multiplication facts
  • Addition
  • Counting
  • Beginning multiplication
  • Understanding sides of a shape

Common mistakes to watch for

  • Mixing up area and perimeter
  • Adding only two sides for perimeter instead of all four
  • Counting only the border squares
  • Counting some squares twice
  • Adding only two sides of a rectangle
Filter:
Preview of the Perimeter of Shapes Worksheet for 3rd Grade
🔢Math Standard

Perimeter of Shapes Worksheet

Find the perimeter — the distance around a shape — by adding all of its side lengths.

3rd Grade 14 min ✓ Answer key

Suggested Practice Sequence

  1. 1 Area: Count the Unit Squares Worksheet easy
  2. 2 Area and Perimeter Worksheet (Rectangles) standard
  3. 3 Perimeter of Shapes Worksheet standard

Related Skills

Frequently Asked Questions

What do 3rd Grade students practice with area & perimeter?

Students will find the area and perimeter of rectangles given their length and width.

Are these worksheets free and printable?

Yes — every worksheet is a free, printable PDF with an answer key. No sign-up required.