Apply the area and perimeter formulas for rectangles in real world and mathematical problems

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Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
Guided Notes →One page your students fill in and keep.
Exit Ticket →Three items at the end of class. No student accounts.
Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
Homework →Assign practice; it grades itself.

4.MD.A.3

**4.MD.A.3**: Apply the area and perimeter formulas for rectangles in real world and mathematical problems. For example, find the width of a rectangular room given the area of the flooring and the length, by viewing the area formula as a multiplication equation with an unknown factor.

4.MD.A.3: Apply the area and perimeter formulas for rectangles in real world and mathematical problems. For example, find the width of a rectangular room given the area of the flooring and the length, by viewing the area formula as a multiplication equation with an unknown factor.

What you'll learn

Use the area formula A = l x w to find the area of a rectangle when both dimensions are given
Use the perimeter formula P = 2l + 2w (or equivalently P = 2(l + w)) to find the perimeter of a rectangle when both dimensions are given
Find an unknown dimension of a rectangle given its area and one side length, by viewing the area formula as a multiplication equation with an unknown factor
Find an unknown dimension of a rectangle given its perimeter and one side length
Determine whether a real-world problem requires area or perimeter based on context clues, and select and apply the correct formula

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Applying area and perimeter formulas

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