2021 JMPSC Sprint Problems/Problem 16
Contents
[hide]Problem
is a concave quadrilateral with , , , and . Find the area of .
Solution
Notice that and by the Pythagorean Thereom. We then have that the area of triangle of is , and the area of triangle is , so the area of quadrilateral is .
~Mathdreams
Solution 2
Therefore,
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See also
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