Area and Perimeter Expressions

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the formula for the perimeter of a rectangle?

Back

Perimeter = 2(length + width).

Front

What does it mean for two expressions to be equivalent?

Back

Two expressions are equivalent if they have the same value for all values of their variables.

Front

Simplify the expression: 5(x - 2) + 15.

Back

5x + 5.

Front

What is the area of a rectangle with length 3x and width 2x?

Back

Area = 6x².

Front

If the perimeter of a rectangle is 20 and the length is 6, what is the width?

Back

Width = 4.

Front

What is the equivalent expression for 7x - 14?

Back

7(x - 2).

Front

Find the area of a rectangle with length 4x and width 3x.

Back

Area = 12x².

Front

What is the simplified form of 2(x - 3)?

Back

2x - 6.

Front

If the area of a rectangle is 9x² - 2x, what could be its dimensions?

Back

Possible dimensions: (3x)(3x - 2/3).