Finding Length of Unknown Sides: Area and Perimeter of Rectangles

This video tutorial teaches how to find the length of an unknown side of a rectangle by applying formulas for perimeter and area. It explains the concepts of perimeter as the distance around a figure and area as the number of square units needed to cover a surface. The tutorial provides step-by-step examples to calculate missing dimensions using these formulas, emphasizing the relationship between multiplication and division in solving for unknowns. By the end, viewers will understand how to apply these mathematical concepts to solve real-world problems involving rectangles.

What is the formula for the perimeter of a rectangle?

• P = 2 * L * W

• P = L * W

• P = 2 * (L + W)

• P = L + W

If the perimeter of a rectangle is 18 feet and one length is 6 feet, what is the width?

• 5 feet

• 4 feet

• 3 feet

• 2 feet

How do you find the width of a rectangle if the area is 18 square units and one side is 6 units?

• Multiply 18 by 6

• Divide 18 by 6

• Add 18 and 6

• Subtract 6 from 18

If the area of a rectangle is 20 square units and the length is 5 units, what is the width?

• 5 units

• 4 units

• 3 units

• 2 units

What is the width of a rectangle if the perimeter is 30 feet and the length is 8 feet?

• 8 feet

• 7 feet

• 6 feet

• 5 feet

If the area of a dog pen is 56 square feet and the length is 8 feet, what is the width?

• 8 feet

• 9 feet

• 6 feet

• 7 feet

Which operation is the inverse of multiplication when solving for an unknown side in a rectangle?

• Addition

• Subtraction

• Division

• Exponentiation