Finding the Unknown Sides' Lengths

The video tutorial explains how to find the missing side length of a quadrilateral when the perimeter and three side lengths are known. It begins by setting up an equation using the known values and a question mark for the unknown side. The tutorial then demonstrates solving the equation by simplifying and using subtraction to find the missing length. Finally, it verifies the solution by substituting the found value back into the original equation to ensure the perimeter is correct.

What is the first step in finding the missing side of a quadrilateral when the perimeter is known?

• Measure the missing side directly.

• Guess the length of the missing side.

• Write an equation for the perimeter.

• Divide the perimeter by four.

How do you simplify the equation to find the missing side length?

• Add the perimeter to the known sides.

• Subtract the sum of known sides from the perimeter.

• Divide the perimeter by the number of sides.

• Multiply all known side lengths.

What is the missing side length if the perimeter is 37 feet and the known sides are 4, 5, and 12 feet?

• 20 feet

• 18 feet

• 16 feet

• 14 feet

What is the purpose of rewriting the equation as a subtraction problem?

• To make the equation more complex.

• To find the missing side length easily.

• To eliminate the need for addition.

• To check if the perimeter is correct.

How can you verify that the calculated missing side length is correct?

• By guessing another length.

• By measuring the side again.

• By dividing the perimeter by the number of sides.

• By checking if the sum of all sides equals the perimeter.