Geometry Glossary - V
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vertex:	The common endpoint of an angle.
vertex angle of an isosceles triangle:	The angle formed by the legs of an isosceles triangle.
vertical angles:	Two nonadjacent angles formed by intersecting lines.
volume:	The product of the area of a base and the length of an altitude. (V = Bh, where B = area of base and b = altitude.)

Note: The terms in this collection may not be entirely accurate.
They are for reference only.

vertex: