Illustration of the intersection of a square pyramid and a plane.

Exercise problem to develop, or rolled out, image of the triangular pyramid by creating an equal length…

Illustration of the intersection of a triangular pyramid and a plane.

Diagram used to prove the theorem: "The volume of a triangular pyramid is equal to one third of a triangular…

Diagram used to prove the theorem: "Two triangular pyramids having equivalent bases and equal altitudes…