¶ 2016 AMC 10A Problem 11
Problem:
What is the area of the shaded region of the given rectangle?
Answer Choices:
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B.
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E.
Solution:
The diagonal of the rectangle from upper left to lower right divides the shaded region into four triangles. Two of them have a -unit horizontal base and altitude , and the other two have a -unit vertical base and altitude . Therefore the total area is .
The problems on this page are the property of the MAA's American Mathematics Competitions