Model Area Perimeter Expressions

Find the perimeter of the rectangle.

• 3x + 7

• 6x + 14

• 18x + 6

• 18x + 6

Find the perimeter of the rectangle.

• 16x + 20

• 8x + 10

• 80x

• 18x

Find the area of the rectangle.

• 8x + 12

• 4x + 6

• 3x² + 6x

• 3x² + 6 

Which of the following best represents the perimeter of the given polygon?

• 4x + 28

• 2x + 21

• 3x + 21

• 4x + 21

Find the area of the rectangle.

• 9x - 2

• 2x

• 18x

• 4

• 20x - 4

• 9x + 2

• 2 + x

• 11x

• 0

• 20x + 4

Answer explanation

To find the area of the rectangle, we use the formula for area, which is length times width. The expression simplifies to 9x - 2, which is one of the correct choices.

What expression may be used to model the perimeter of the given polygon?

• 12x + 2y - 2

• 12x + 6y + 2

• 12x + 6y - 6

• 12x + 6

Complete the expression that is shown by this area model.
2.2 x .....

Write the expression for the perimeter of the given rectangle. Choose the best answer.

• 6x + 5

• 12x + 10

• 8x + 6

• 16x + 12

Find the perimeter of the rectangle

• 2x - 2 

• 6x - 15 

• 4x - 4 

• 6x - 15

Find the area of the rectangle.

• 9x² - 2x

• 9x² - 2

• 10x - 2

• 20x - 4