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AlladinOne [14]
3 years ago
5

A rectangle is called cool if the number of square units in its area is equal to twice the number of units in its perimeter. A c

ool rectangle also must have integer side lengths. What is the sum of all the different possible areas of cool rectangles?
Mathematics
1 answer:
bekas [8.4K]3 years ago
3 0
Rectangles that are 5×20, 6×12, or 8×8 will satisfy your criteria. The sum of the areas of those is 236 units².

_____
20×5 and 12×6 rectangles are also "cool", but their areas are not different from those already counted.
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