One of the angles is a righ angle. The only possible way to make a triangle with a right angle is if the other two angles are 45 each. If either of them was more than 45 degrees, that would force the third angle to be obtuse( and not a right-angle), and if either of them were less than 45 then that would make the third angle acute (and not a right-angle)

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Jeff

Renderosity Senior Moderator

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