Viewing other problems with insights similar to only this insight from 2023 AMC 10B Problem 25:
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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2022 AMC 12B Problem 14
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- tan(A+B) = (tan(A) + tan(B))/(1 - tan(A)*tan(B)) by Richie
- Note that ∠ABO < π/2 and∠CBO < π/2 by Richie
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2023 AMC 8 Problem 1
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- <h1>I think trying to calculate the value might help??? idk</h1> Hmm, lets do multiplication first? by programmeruser
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Codeforces 1846D: Rudolph and Christmas Tree
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- -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
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