# GEOMETRY GLOSSARY

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Title Description
Face, Geometry Solids, in geometry, are considered to have faces when lateral sides are flat, that is, planar.
Foci Certain points in conic sections (and other geometric entities) are termed Foci, the plural of focus.
They are important to the mathematical mechanics of the functions.
Focus A specific point in a conic section (or other geometric entity) is termed a Focus, the singular form of the word foci.
They are important to the mathematical mechanics of the functions.
Formula A recipe or algorithm for calculation, evaluation, simplification, or just about anything we do in mathematics can be called a Formula.
Fractal Certain shapes maintain their shape through all permutations of multiplication, growth, dilation, division, contraction, or shrinkage.
Such shapes are Fractals.
Frustum Slice a pyramid (or cone) parallel to its base, remove the top.
What remains under the "missing top" is the Frustum.

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