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Originally Posted by jermio  I scanned this because I didn't even know how to explain this problem or where to start. Let me know what you guys think! 
Thanks For your help! |
The area enclosed by the triangles is obviously half the area of the rectangle that encloses them which is 1 by 2, so the required area is 1.
(each triangle encloses half the area of the rectangle on the same base and of the same height that encloses it and the sum of the areas of these rectangles is the area of the big rectangle)
CB