angle of normal vector

[markraz]

Hi what is the process to finding the angle of a normal with respect to the XYZ origin? (not the angle with respect to the plane) thanks

 

[Ishuda]

Hi what is the process to finding the angle of a normal with respect to the XYZ origin? (not the angle with respect to the plane) thanks

You might try
http://www.mathsisfun.com/algebra/vectors-dot-product.html