Rectangle Dimensions and 5D Process

Mr. Dell introduces a word problem involving a rectangle with an area of 168 square units. The problem is solved using the 5D process, also known as the guess and check method. The video walks through defining the problem, making initial guesses, checking calculations, and adjusting guesses until the correct dimensions of the rectangle are found. The solution reveals the sides of the rectangle as 12 and 14 units. The video concludes with a review of the problem-solving process and the relationships between the sides of the rectangle.

What is the 5D process also known as?

• Declare and Do

• Define and Decide

• Guess and Check

• Draw and Describe

Which course and section does the problem come from?

• Course 3, Section 5.3.3

• Course 2, Section 5.3.3

• Course 1, Section 5.3.3

• Course 2, Section 4.3.3

What is the total area of the rectangle in the problem?

• 150 square units

• 120 square units

• 168 square units

• 180 square units

If one side of the rectangle is X, what is the other side?

• X + 4

• X + 2

• X + 1

• X + 3

What was the initial guess for the length of side one?

• 14

• 12

• 10

• 8

What is the first step in the 5D process?

• Define

• Draw and Describe

• Declare

• Do

What was the area calculated with the initial guess of 10 and 12?

• 120

• 100

• 140

• 168

What adjustment was made after the initial guess?

• Guess lower

• Guess higher

• Keep the same

• Change the formula

What is the purpose of the 'do' part in the 5D process?

• To check the area

• To guess the length

• To declare the result

• To define the sides

What does the 'check' part of the 5D process involve?

• Checking the process

• Checking the sides

• Checking the area

• Checking the guess