# Lesson Plan: Perimeter of Rectangles and Squares Mathematics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find the perimeter and area of squares and rectangles.

#### Objectives

Students will be able to

• understand that the perimeter of a shape is the distance around its edge,
• understand that the area of a shape is the amount of space inside it,
• find the perimeter or area of a square or rectangle from a diagram by counting squares,
• describe the formulas for finding the perimeters of squares and rectangles using words,
• find the perimeter of a square or rectangle given its dimensions,
• find the side length of a square given its perimeter,
• find the length or width of a rectangle given its perimeter and other dimensions,
• find the perimeter of a rectangle in which the length and width are given in different metric units,
• find the area of a square or rectangle given its dimensions,
• find the length or width of a rectangle given the other dimensions and its area.

#### Prerequisites

Students should already be familiar with

• how to recognize squares and rectangles,
• converting between metric units for length,
• adding, subtracting, multiplying, and dividing whole numbers within 1,000.

#### Exclusions

Students will not cover

• calculating perimeters or areas of squares and rectangles where the side lengths are noninteger values,
• calculating perimeters or areas of any other 2D shapes,
• conversion of area units.