I know this is really basic, but I just can't seem to remember... Say you have three points (0,0,2),(0,2,0) and (2,0,0) to form a triangle. How do you calculate the normal to the surface?
Welcome to PF! Hi Natalie89! Welcome to PF! Hint: it has to be perpendicular to any two vectors in the surface … so find any two vectors, and use the cross product