Geom
The Why of Area Formulas
See this GeoGebra Classroom Activity https://www.geogebra.org/m/jkszrqfa Green points are drag-able.
Why is Volume of a Pyramid one-third the Prism?
This vides shows why the volume of a pyramid is 1/3 of the volume of the prism with the same base and same height. This can be done using the solids in the Math Resource Office (MRO) at Western Illinois University.
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