Finding the Missing Length of a Rectangle Using the Perimeter Formula

This video tutorial teaches how to determine the missing length of a rectangle using the perimeter formula. It explains the difference between perimeter and area, and demonstrates the use of algorithms and variables in problem-solving. Through examples, it shows how to find missing dimensions of rectangles, emphasizing the importance of following step-by-step instructions to arrive at the correct solution.

What is the purpose of an algorithm in problem-solving?

• To confuse the user

• To eliminate the need for calculations

• To provide a random solution

• To give step-by-step instructions

Which of the following best describes a variable in mathematics?

• A type of algorithm

• A symbol representing an unknown number

• A fixed number

• A mathematical operation

How is the perimeter of a rectangle calculated?

• Length minus width

• 2 times length plus 2 times width

• Length plus width

• Length times width

In the example, what was the missing width of the rectangle with a perimeter of 14 yards and a length of 4 yards?

• 4 yards

• 3 yards

• 5 yards

• 2 yards

What is the significance of using unit squares in verifying the perimeter?

• To calculate the area

• To visually confirm the perimeter

• To find the volume

• To check the congruency of sides

If the perimeter of a boxing ring is 320 feet and the width is 80 feet, what is the length?

• 90 feet

• 60 feet

• 70 feet

• 80 feet

What is the first step in solving for the missing length of a rectangle using the perimeter formula?

• Guess the length

• Use the area formula

• Divide the perimeter by the width

• Substitute known values into the perimeter formula