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| All angles in the triangle are less than 90 degrees. | ||
| A triangle where one angle measures over 90 degrees. | ||
| One angle in the triangle measures exactly 90 degrees. | ||
| A triangle with at least 2 congruent sides | ||
| All the sides of the triangle are equal in length | ||
| No equal sides | ||
| Quadrilateral with 2 pairs of adjacent congruent sides, with perpendicular diagnals | ||
| A quadrilateral with 4 sides that are equal and has all 90 degree angles | ||
| A quadrilateral, all 4 sides the same length | ||
| Quadrilateral in which exactly 1 pair of parallel sides | ||
| A quadrilateral with at least 1 pair of parallel sides | ||
| A quadrilateral in which the opposite sides are parallel, all angles are 90 degrees | ||
| Quadrilateral in which the opposite sides are parallel | ||
| All points in a space that are a fixed distance away from a fixed poit | ||
| An infinite number of points connected around an equal distance from a middle point` | ||
| (The plural is polyhedra) A three dimensional object whose surfaces are composed of polygonal regions (faces, verices, edges) | ||
| is defined in a manner similar to that used in defining a convex polygon | ||
| Is defined in a manner similar to that used in defining a concave polygon. | ||
| is defined in a manner similar to that used in defining a convex polygon | ||
| a polyhedron that has two parallel faces that are congruent. These 2 faces are called the bases of the prism. The other faces of the prism are called the lateral faces. (right prism, oblique prism) | ||
| A polyhedron whose base is a polygon ad whose faces are triangles that have a common vertex. That common vertex is called the apex of the pyramid. | ||
| A convex polyhedron in which the faces are congruent regular polygons and in which the number of edges that meet at each vertex are the same. | ||
| A simple closed surface that is bounded by two congruent simple closed surfaces that lie in the parallel plane | ||
| A siple closed surface whose base is a simple closed surface and whose lateral surfaces slopes up to a vertex that is called the apex | ||
| The set of all points in a three dimensional space that are the same distance from a fixed point, called the center |
