Understanding Perimeter and Width of a Rectangle

The video tutorial explains how to determine the width of a rectangular dog pen given its length and perimeter. It starts by introducing the problem and drawing a diagram of the pen. The concept of perimeter is explained, followed by a step-by-step calculation to find the width. The solution is verified by adding the calculated dimensions to ensure they match the given perimeter.

What is the length of Mike's dog pen?

• 78 feet

• 36 feet

• 21 feet

• 18 feet

Tags

CCSS.3.MD.D.8

What is the perimeter of Mike's dog pen?

• 21 feet

• 36 feet

• 42 feet

• 78 feet

Tags

CCSS.4.MD.A.2

If the length of the dog pen is 21 feet, what is the total length of both sides combined?

• 21 feet

• 42 feet

• 36 feet

• 78 feet

Tags

CCSS.3.MD.D.8

How do you calculate the width of the dog pen using the perimeter?

• Divide the perimeter by the length

• Add the perimeter and the length

• Multiply the lengths and subtract from the perimeter

• Add the lengths and subtract from the perimeter

Tags

CCSS.3.MD.D.8

What is the result of subtracting the total length of both sides from the perimeter?

• 78 feet

• 42 feet

• 36 feet

• 18 feet

Tags

CCSS.4.MD.A.3

What is the width of one side of the dog pen?

• 42 feet

• 36 feet

• 18 feet

• 21 feet

Tags

CCSS.3.MD.D.8

How can you verify the width calculation?

• By multiplying the lengths and widths

• By subtracting the widths from the lengths

• By adding the lengths and widths to see if they match the perimeter

• By dividing the perimeter by the width

Tags

CCSS.4.MD.A.3

What is the sum of the two widths of the dog pen?

• 18 feet

• 21 feet

• 36 feet

• 42 feet

Tags

CCSS.4.MD.A.2

What is the total length of the dog pen when adding all sides together?

• 36 feet

• 42 feet

• 78 feet

• 21 feet

Tags

CCSS.3.MD.D.8

Which of the following equations correctly represents the perimeter of the dog pen?

• 21 + 21 + 18 + 18 = 78

• 18 + 18 + 18 + 18 = 78

• 21 + 18 + 18 = 78

• 21 + 21 + 21 + 21 = 78

Tags

CCSS.3.MD.D.8