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Math Worksheets
Lessons for Third Grade
Free Printable Worksheets
In these free math worksheets, you will learn how to calculate the perimeter of regular shapes and rectangles. You can also practice solving perimeter word problems. You can either print the worksheets (pdf) or practice online.
Perimeter refers to the total distance around the outside of a two-dimensional shape. It is calculated by adding up the lengths of all the sides of the shape.
A regular shape is a two-dimensional shape where all sides have equal length and all angles have equal measure. When calculating the perimeter of a regular shape we can either add the lengths of all the sides or we can find the length of one side and multiply by the number of sides.
When calculating the perimeter of a rectangle, we can add up the lengths of all the sides or we can use the formula
P = 2(l + w)
where P is the perimeter, l is the length, and w is the width. This formula works because a rectangle has two pairs of parallel sides, and each pair has the same length. Therefore, to find the perimeter, you can add up the lengths of all four sides, which is the same as adding up two lengths and two widths.
Have a look at this video if you need to learn how to find the perimeter of a shape.
Click on the following worksheet to get a printable pdf document.
Scroll down the page for more Perimeter Worksheets.
Printable
Perimeter Worksheet #1
(Answers on the second page.)
Perimeter Worksheet #2
(Answers on the second page.)
Perimeter Word Problems
Perimeter Word Problems (Online Worksheet & Answers)
Area & Perimeter of Rectangles 1
Area & Perimeter of Rectangles 2
Area & Perimeter of Rectangles 3
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