Frustum of Cone - Definition, Properties, Formula, and Examples
Frustum - Wikipedia
Pyramidal Frustum -- from Wolfram MathWorld
Frustum
frustum ~ A Maths Dictionary for Kids Quick Reference by Jenny Eather
Frustum: Simple Definition, Volume - Statistics How To
What is the midsection of a frustum and how do you calculate its perimeter? - Quora
Fermat's Library on Twitter: "It's remarkable that 3870 years ago the Egyptians were able to determine the formula for the volume of the frustum of a square pyramid without any notion of
What is frustum of a cone - Definition and Meaning - Math Dictionary