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# Howard Geometry 9

### Chapter 9 Geometry Vocabulary

TermDefinition
Prism A polyhedron with two, congruent faces that lie in parallel planes.
Cylinder A solid with two, congruent circular bases that lie in parallel planes.
Pyramid A polyhedron with one base and triangular lateral sides that meet at a common vertex.
Cone A solid with a circular base and a vertex that is not in the same plane as the base.
Sphere The set of all points in a plane equidistant from a given plane
Surface Area The sum of the areas of all of the faces of a solid
Volume The number of cubic unit s contained in the interior of a solid figure
Net A two dimensional representation of a three dimensional object
Cubic Units The units always used in volume
Square Units The unit always used for surface area
Parallel The bases of a prism are always polygonal, congruent and ______________?
Solid A three-dimensional object
Polyhedron A special solid figure formed by polygons
Bases Polyhedrons are named by the shape of these
Lateral Area The surface area of a polyhedron that does NOT include the area of the bases
Vertex The point where two edges meet
Edge The point where two faces meet
Faces The flat, polygonal surfaces of a polyhedron
Slant Height The perpendicular distance from the edge of base of a pyramid or cone to the vertex
Height of a Prism The distance between the two, polygon bases
Height of a Cylinder The distance between the two, circular bases
Height of a Cone The distance between the vertex and the center of the circular base
Height of a Pyramid The distance between the top vertex and the center of the polygonal base
Radius The segment formed by connecting the center of a circle to any point on the circle
Diameter The segment formed by connecting any two points on a circle that passes though the center
Created by: HowardGeometry

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