Lesson: Perimeter of Rectangles and Squares Mathematics • 3rd Grade

In this lesson, we will learn how to find the perimeters of rectangles and squares using multiplication, write equations for the perimeter, and recognize the formula for calculating the areas of these shapes.

Lesson Plan

Students will be able to

write the formula for the perimeter of a rectangle in words,
write the formula for the perimeter of a square in words,
write equations to describe and find the perimeter of a rectangle or square,
find missing side lengths of rectangles and squares given the perimeter,
compare perimeters of rectangles and squares.

Lesson Explainer

Sample Question Videos

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Lesson Worksheet

Q1:

Find the perimeter of a rectangle whose length is 35 cm and width is 15 cm.

Q2:

Find the perimeter of the rectangle.

Q3:

Calculate the perimeter of the square .