Wolfram Research
Wolfram Math World: Reflection
This site defines reflection, separates reflection into two categories of amphichiral and chiral. The site also gives formulas used in reflective symmetry including point-plane distance, position of reflected points and has links to...
Wolfram Research
Wolfram Math World: Plane
This site defines a plane in terms of geometric surfaces. Content includes formulas for a plane using the normal vector, how to find the x, y, and z intercepts of a plane, distance from the origin, point plane distance formula, dihedral...
Wolfram Research
Wolfram Math World: Point Plane Distance
Find the distance between a point and a plane using the algebraic formula for the plane and the Cartesian points. This MathWorld page has a labeled diagram to help clarify the equation variables.