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Howard Geometry 9
Chapter 9 Geometry Vocabulary
Term | Definition |
---|---|
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 |