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9-51.
The area of a rectangle is 42 cm2. If the length and width each grow four times longer, what will the new area be? Homework Help ✎
Make an example of a rectangle with an area of 42 cm2.
Since the area of a rectangle is (base)(height), which two numbers multiplied together gives 42?
Multiply base and height by 4
Now find the area of the larger rectangle by multiplying the new base and the new height.