Perimeter of Rectangles
A free printable perimeter of rectangles worksheet with an answer key. Add up all four sides to find the perimeter. Perfect for 3rd grade practice at home or in class.
- Size
- US Letter (8.5 × 11 in), fits A4
- 2 pages: the worksheet and its answer key
- Level
- Grade 3
- License
- Free for personal & classroom use
About this worksheet
A free printable perimeter of rectangles worksheet with an answer key. Add up all four sides to find the perimeter. It is aimed at third grade, around ages 8 to 9. Line the object up with the 0 on the ruler, not with the end of the ruler.
Answer key at a glance
1) 12 cm 2 cm Perimeter = 28 cm; 2) 3 cm 6 cm Perimeter = 18 cm; 3) 5 cm 3 cm Perimeter = 16 cm; 4) 8 cm 6 cm Perimeter = 28 cm; 5) 11 cm 7 cm Perimeter = 36 cm; 6) 6 cm 7 cm Perimeter = 26 cm.
Tips for using it
- Guess first, then measure: kids get better at estimating with every try.
- Measure a few things at home too, like a spoon, a shoe or a toy car.
- Perimeter: add all the sides. For a rectangle, double the length plus the width.
- Area: multiply length by width and write 'square' units.
Printing tips
Download the PDF and print at 100% (or “fit to page” on A4). Page 1 is the worksheet and page 2 is the answer key with the answers in red; print just page 1 if you want to keep the answers for checking. The PNG shows page 1 only. Free for personal, family and classroom use.
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