Answer: Using the dot product of edges.
- A Averaging their coordinates
- B Finding the normal using cross product of two edge vectors
- C Using the dot product of edges
- D Summing position vectors
Correct answer: C. Using the dot product of edges
Explanation: Find two edge vectors from one vertex. Their cross product gives the normal. Then use point-normal form for the plane equation.
Three mutually perpendicular axes x, y, z meeting at the origin O, with a point P located by its (x, y, z) coordinates.
Concept context
Lines and planes in 3D space, direction cosines, distances, and angles