1980 AHSME Problems/Problem 7
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Problem
Sides and
of convex polygon
have lengths 3, 4, 12, and 13, respectively, and
is a right angle. The area of the quadrilateral is
Solution
Connect C and A, and we have a 3-4-5 right triangle and 5-12-13 right triangle. The area of both is .
See also
1980 AHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 6 |
Followed by Problem 8 | |
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