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This is a quite difficult problem. First of all we need to calculate all angle relations. Then we need to take into account rotations and reflections - in this way we have only non-similar quadrilaterals. Finally we have to pick those angles that satisfie given order condition.
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Project Euler #177: Integer angled Quadrilaterals.
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This is a quite difficult problem. First of all we need to calculate all angle relations. Then we need to take into account rotations and reflections - in this way we have only non-similar quadrilaterals. Finally we have to pick those angles that satisfie given order condition.