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# Geometry Chapter 12

### Geometry Chapter 12 Vocabulary

a solid that is bounded by polygons, called faces, that enclose a single region of space polyhedron
a point where three or more edges of a polyhedron meet vertex
a line segment formed by the intersection of 2 faces of a polyhedron edge
five regular polyhedra, named after the greek mathematician and philospher plato platonic solids
the intersection of a plane and a solid cross section
a polyhedron with two congruent faces, called bases, that lie in parallel planes prism
the sum of the areas of the fences of a polyhedron or other solid surface area
the sum of the areas of the lateral faces of a polyhedron or other solid with 1 or 2 bases lateral area
the two dimensional representation of the faces of a polyhedron net
a prism in which each lateral edge is perpendicular to both bases right prism
a prism with lateral ledges that are not perpendicular to the bases oblique prism
a solid with congruent circular bases that lie in parallel planes cylinder
a cylindar in which the segment joining the centers of the bases is perpendicular to the bases right cylinder
a polyhedron in which the base is a polygon and the lateral faces are triangles with a common vertex called the vertex of the pyramid pyramid
a pyramid that has a regular polygonfor a base and in which the segment joining the vertex and the center of the base is perpendicular to the base regular pyramid
a solid that has 1 circular base and a vertex that is not in the same plane as the base cone
a cone in which the segment joining the vertex and the center of the base is perpendicular to the base right cone
the number of cubic units contained in the interior of a solid volume
the set of all pointsin space equidistant from a given point called the center of the sphere sphere
the intersection of a sphere and a plane that contains the center of the sphere great circle
half of a sphere, formed when a great circle seperates a sphere into 2 congruent halves hemisphere
two solids of the same type with with equal ratios of cooresponding linear measures, such asheights or radii similar solids
Created by: aelohaus