Figure perimeterEvery figure
Name: Date:
Add every side. All lengths are in centimeters.
1 cm
2 cm
3 cm
4 cm
5 cm
6 cm
7 cm
8 cm
Perimeter of triangles and quadrilaterals worksheets
A rectangle's perimeter can be found without really looking at the figure. A scalene triangle's cannot. These free printable worksheets put four sides on the page and ask a child to find and add all of them.
If they get stuck
Perimeter of triangles and quadrilaterals
The answer key prints on a separate page.
What's on this sheet
Every edge carries its own number, including the slanted ones. That is the opposite of the area sheets, where slant sides are deliberately left unlabeled so a child cannot mistake one for the height — here every side counts toward the answer, so a figure with an unlabeled edge would be unanswerable rather than harder.
Why this sheet works
The shapes are built from their side lengths rather than sketched, which means a triangle with sides 14, 13, and 17 is drawn as exactly that triangle. Two sheets with different numbers can never come out as the same picture, and a child checking their answer against the drawing is doing something the drawing supports.
How this one works
One question from a sheet like this one, worked a step at a time — with a sentence saying what just happened and why.
Perimeter of triangles and quadrilaterals, step by step