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**Sidelines** Hello, so I've been trying to find out how to find the normal angle of a triangle when only knowing the X,Y and Z coordinates of each corner. The triangle will always be a right triangle. If you took a square and cut it from bottom left to top right, it would be one of the two triangles made from that. Anyways, I know the X Y and Z of each corner and the hyp will always be the square root of two (sides are 1). I've never done angles in 3 dimensions, but I think I will need to find a normal angle for XY and Z seperately. Even if that isn't necessary, I need two separate angles. Thanks for any help! Also the angle would be on the face of the triangle facing upwards.