Viewing insights from 2023 AMC 10B Problem 25 that are similar (thus shared) with only this insight from Codeforces 1846D: Rudolph and Christmas Tree: -Notice there are only two cases: either the triangle is completely alone or it is overlapped with another triangle. In the second case, the remaining area is a trapezoid... by fluffy_mango
- The pentagon has an angle of 180 x 3/5 which is 36x3 = 108 degrees If we split the area into 5 equal triangles each triangle has area 1+ root(5) / 5 by mathed2718
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