Vocabulary Word Meaning
Lesson Two
| prism | A solid geometrical shape whose ends have the shape of a closed polygon, like a triangle, square, or hexagon. A prism of glass or other clear material used specifically for dispersing a beam of light into its spectrum. |
| cone | A shape whose base is a circle and whose sides taper up to a point. |
| cube | A three-dimensional shape with six square or rectangular sides. |
| pyramid | A polyhedron having a polygonal base and triangular sides with a common vertex. |
| cylinder | A three-dimensional figure with two congruent bases in parallel planes. |
| sphere | A three-dimensional closed surface such that every point on the surface is equidistant from the center. |
| box | A three-dimensional object defined by an origin (that is, a corner of the box) and three vectors that define the edges of the box meeting in that corner. |
| dimensional |
A line is a one-dimensional object; a plane, like a sheet of paper with no thickness, is a two dimensional object; and ordinary objects such as tea cups are three-dimensional. |