Finding the Perimeter of Shapes Formulas Worksheet
Finding the Perimeter of Shapes Formulas Worksheet gives 4th grade students six labeled figures and a garden border word problem to solve. An answer key is included, so checking the whole page takes seconds.
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About this resource
Description
Perimeter is the distance all the way around a closed shape, and fourth graders meet it the moment they start fencing a garden, framing a picture, or measuring the edge of a playground. The Finding the Perimeter of Shapes Formulas Worksheet gives them a clear, repeatable way to do it: use the rectangle formula when the opposite sides are not labeled, use the square formula when every side matches, and add all of the side lengths when the figure is irregular. Taught this way, perimeter stops being a counting exercise and becomes real measurement reasoning.
This 4th grade perimeter worksheet opens with a small formula chart, then asks students to work through six labeled figures: two rectangles, a square, a right triangle, a five-sided house shape, and an L-shaped composite figure. Two of the figures deliberately leave the opposite sides unlabeled, so the formula has to do the work instead of plain addition. A two-step garden border word problem closes the page, and a short explanation line asks students to put their method into words. Use it for guided practice, morning work, homework, or a quick check before a measurement quiz.
What’s Included
- 1 print-ready PDF worksheet
- Answer key
- 6 labeled figure problems plus a two-step perimeter word problem
The Finding the Perimeter of Shapes Formulas Worksheet helps in three ways. First, the formula chart stays right on the page, so a student who is still learning the rules can lean on them while practicing instead of stalling. Second, the mix of shapes builds flexibility, because a child who can only add four labeled sides has not really learned perimeter yet, and the square, the triangle, and the composite figure each ask for something slightly different. Third, every answer box prints its unit beside it, which quietly trains students to keep centimeters, inches, feet, and meters attached to their numbers.
Away from the page, hand students a tape measure and ask them to find the perimeter of a desk, a book, a door, or a rug, estimating first and measuring second. Chalk a large rectangle on the playground and have the class walk its perimeter so the number has a feel as well as a value. At home, measure a picture frame or a garden bed before buying trim or border, exactly like the word problem on this page. Then ask students to invent their own shape with a perimeter of 40 inches, because there are many right answers and comparing them is where the reasoning shows.
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