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Home > MC2 > Chapter 9 > Lesson 9.2.2 > Problem 9-51


The area of a rectangle is cm2. If the length and width each grow four times longer, what will the new area be?  

Make an example of a rectangle with an area of cm2.
Since the area of a rectangle is (base)(height), choose a base and height whose product is .  An example is shown.

A rectangle 6 by 7 centimeters

Multiply the base and height by .

A rectangle 24 by 28 centimeters

Now find the area of the larger rectangle by multiplying the new base and the new height.