Wolfram Research
Wolfram Mathworld: Hexahedron
Learn about hexahedrons and hexahedral graphs from MathWorld.
Math Is Fun
Math Is Fun: Spinning Pentagonal Pyramid
Students learn about the terminology and formulas associated with a pentagonal pyramid. The learning resource consists of facts and an interactive spinning pentagonal pyramid.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Area of a Pentagonal Pyramid
This question and answer site reviews finding both the area and volume of a pentagonal pyramid.