Understanding the Perimeter of a Rectangle

This video tutorial explains how to find the perimeter of a rectangle. It begins by defining the perimeter as the total distance around all four sides of a rectangle. The tutorial then demonstrates two methods for calculating the perimeter: by adding the lengths of all sides and by using the formula 2(l + w). Both methods are illustrated with an example of a rectangle with sides measuring 5 inches and 8 inches, resulting in a perimeter of 26 inches. The video concludes by summarizing the two approaches and emphasizing the importance of including units in the final answer.

What is the perimeter of a rectangle?

• The area inside the rectangle

• The sum of the diagonals

• The distance around all four sides

• The length of one side

Tags

CCSS.4.MD.A.3

If a rectangle has sides of 5 inches and 8 inches, what is the perimeter?

• 40 inches

• 26 inches

• 10 inches

• 13 inches

Tags

CCSS.4.MD.A.3

Which of the following is a correct method to find the perimeter of a rectangle?

• Add the length and width, then multiply by two

• Divide the length by the width

• Multiply the length by the width

• Subtract the width from the length

Tags

CCSS.4.MD.A.3

What is the formula for calculating the perimeter of a rectangle?

• 2(l + w)

• l + w

• l * w

• l - w

Tags

CCSS.4.MD.A.3

If the length of a rectangle is 5 inches and the width is 8 inches, what is the result of using the formula 2(l + w)?

• 40 inches

• 16 inches

• 10 inches

• 26 inches

Why is it important to add units when calculating the perimeter?

• To make the calculation easier

• To ensure the measurement is accurate

• To make the number larger

• To convert the measurement to meters

Tags

CCSS.4.MD.A.3

What is the perimeter of a rectangle with sides measuring 5 inches and 8 inches using the formula method?

• 10 inches

• 40 inches

• 26 inches

• 13 inches

Tags

CCSS.4.MD.A.3