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English: ABCD square and BEFG square are put together. The difference between the areas of two squares is equal to 37 square centimeters. Q: What is the area of the quadrilateral CDGF?
Answer: Let the side length of square ABCD be A and the side length of square BEFG be B.
Area of quadrilateral CDGF
=(FG+CD)×CG÷2
=(b+a)×(a-b)÷2
=(a？ -B? )/2
=37/2㎝?
= 18.5㎝?
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