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Please help look at picture. 26 points for helping

Please help look at picture. 26 points for helping-example-1
User Belgther
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1 Answer

1 vote
It's 21 square units. If you map it on a complex plane (x-axis is real numbers, y-axis is imaginary numbers) you'll see that the sides of the rectangle is 3 and 7 which multiply to 21.
User Alex Hill
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