What is the volume of a right pyramid whose base is a square with a side 6m long and whose altitude is equal to the base side? A. 72 m3 B. 216 m3 C. 36 m3 D. 108 m3

The 4-dimensional volume of a polyhedral pyramid is 1/4 of the volume of the base polyhedron times its perpendicular height, compared to the area of a triangle being 1/2 the length of the base times the height and the volume of a pyramid being 1/3 the area of the base times the height.