Rectangle Perimeter Worksheets
Teach perimeter as one complete trip around a boundary.
Teaching notes for parents and teachers
How to teach it
Trace each side of a rectangle and label its length. Add all four lengths, noting that opposite sides match.
Example to work through together
Use the model below as you explain the example. Have your student point to the quantities as you discuss them.
6 + 3 + 6 + 3 = 18 units
You can also add the two different lengths and double: 2 × (6 + 3) = 18.
Ask your student
Have we counted every side exactly once?
If your student needs help
If the student multiplies side lengths, contrast the outline with the surface inside it.
Choosing and using the worksheet
Each set has six distinct pairs of side lengths from 2 through 9 units. The original diagrams and numerical answers are preserved. The answer key gives the total perimeter. Use the space below each picture to record a sum that shows all four sides.
Make a practice set
Select the worksheet, answer key, or both. When both are selected, the answer key prints after the questions. Keep it separate if you want your student to work independently.
After your student finishes
Ask the child to trace one rectangle and explain how two labels determine all four sides. Check that the written sum includes each side exactly once.
More about measurement · Grade 3 worksheets
Grade 3 selected skill connection: 3.MD.D.8. See the Common Core standards for this grade. This worksheet does not cover every requirement in the standard.