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philomath_geometry_b_vocab_02
Second common list of vocabulary terms for geometry b
20
Mathematics
10th Grade
02/22/2013

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Term
polyhedron
Definition
a closed three-dimensional figure composed of polygons
Term
face (of a polyhedron)
Definition
one of the polygons that forms the surface of a polyhedron
Term
edge (of a polyhedron)
Definition
the segment formed by the intersection of two faces of a polyhedron
Term
regular polyhedron
Definition
a polyhedron in which all faces are congruent, regular polygons
Term
vertex (of a polyhedron)
Definition
a vertex of one of the faces of a polyhedron
Term
prism
Definition
a polyhedron that consists of a polygonal region and its translated image on a parallel plane with parallelogram faces connecting corresponding edges
Term
one of two congruent, parallel faces of a prism
Definition
base (of a prism)
Term
lateral face (of a prism)
Definition
a parallelogram that connects corresponding sides of a prism’s bases
Term
right prism
Definition
a prism in which all of the lateral faces are rectangles
Term
oblique prism
Definition
a prism that has at least one non-rectangular lateral face.
Term
surface area
Definition
the total area of all exposed surfaces of an object
Term
volume
Definition
the number of non-overlapping unit cubes that will exactly fill a three-dimensional object
Term
ratio
Definition
the comparison of two quantities by division
Term
altitude (of a prism)
Definition
a segment that has endpoints in the planes containing the bases and that is perpendicular to both planes
Term
pyramid
Definition
a polyhedron consisting of a polygonal base and three or more triangular faces that connect the edges of the base with a single point
Term
vertex (of a pyramid)
Definition
the point that all lateral faces of a pyramid share
Term
base (of a pyramid)
Definition
the polygon whose edges form one edge of each of a pyramid’s lateral faces
Term
lateral face (of a pyramid)
Definition
one of the triangular faces of a pyramid that connects its base with its vertex.
Term
regular pyramid
Definition
a pyramid whose base is a regular polygon and whose lateral faces are congruent isosceles triangles
Term
altitude (of a pyramid)
Definition
a perpendicular segment from the vertex of a pyramid to the plane containing its base
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