Avondale Geo 3D
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38 terms
Terms | Definitions |
|---|---|
 polyhedron | a solid figure bounded by plane polygons or faces |
| face | cover the front or surface of |
| edge | a sharp side formed by the intersection of two surfaces of an object |
| vertex | the point of intersection of lines or the point opposite the base of a figure |
| regular polyhedron | any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent |
| convex | curving or bulging outward |
| cross section | (physics) the probability that a particular interaction (as capture or ionization) will take place between particles |
| platonic solids | any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent |
| tetrahedron | any polyhedron having four plane faces |
| octahedron | any polyhedron having eight plane faces |
| dodecahedron | any polyhedron having twelve plane faces |
| icosahedron | any polyhedron having twenty plane faces |
| prism | optical device having a triangular shape and made of glass or quartz |
| bases | compounds that reduce the concentration of hydrogen ions in a solution |
| lateral faces | the faces that are not the base of a parallelogram |
| right prism | each lateral edge is perpendicular to both bases |
| oblique prism | a prism that is not a right prism |
| surface area of a polyhedron | the sum of the areas of the faces of the polyhedron |
| lateral area of a polyhedron | the sum of the areas of its lateral faces |
| net | A two-dimensional pattern that can be folded to make a three-dimensional prism or pyramid |
| cylinder | a solid bounded by a cylindrical surface and two parallel planes (the bases) |
| right cylinder | a cylinder where the segment joining the centers of the bases is an altitude |
| lateral area of a cylinder | 2πrh |
| surface area of a cylinder | 2πrh+2πr² |
| pyramid | a massive memorial with a square base and four triangular sides |
| regular pyramid | a pyramid whose base is a regular polygon and whose lateral faces are congruent isosceles triangles |
| circular cone | has a circular base and a vertex that is not in the same plane as the base |
| lateral surface of a cone | pi r l |
| right cone | A cone in which a perpendicular line drawn from the base to the tip (vertex) passes through the center of the base |
| volume of a solid | lwh |
| sphere | any spherically shaped artifact |
| center of a sphere | The point inside a sphere that is the same distance from every point on the sphere. |
| radius of a sphere | a segment that has one endpoint at the center and the other endpoint on the sphere |
| chord of a sphere | a segment whose endpoints are on the sphere |
| diameter of a sphere | chord that contains the center |
| great circle | a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center |
| hemisphere | either half of the cerebrum |
| similar solids | solids with the same shape and all their corresponding dimensions are proportional |
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