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Home > CC2MN > Chapter 4 > Lesson 4.4.2 > Problem 4-139

4-139.

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), which two numbers multiplied together gives ?

Multiply base and height by .

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