Terms : Hide Images
| 2811249357 | undefined term | a point, line, or plane because they can only be explained using examples and descriptions | 0 | |
| 2811249358 | point | Location in space, it has no size | 1 | |
| 2811250298 | line | A collection of an infinite number of points in a straight pathway with unlimited length and having no width. |  | 2 |
| 2811250299 | plane | a flat surface that extends forever | 3 | |
| 2811250628 | collinear | points on the same line |  | 4 |
| 2811250629 | coplanar | points that lie in the same plane |  | 5 |
| 2811251275 | space | The set of all points | 6 | |
| 2811252466 | line segment | a part of a line with two endpoints. It is named by its 2 endpoints. |  | 7 |
| 2811252832 | betweeness of points | A point is "between" 2 other points only when all three points are collinear |  | 8 |
| 2811253666 | congruent segments | line segments that have the same measure |  | 9 |
| 2811253667 | construction | A geometric drawing that uses a limited set of tools, usually a compass and straightedge. | 10 | |
| 2811255388 | distance | Length of a path between two points | 11 | |
| 2811255830 | midpoint | A point that divides a segment into two congruent segments |  | 12 |
| 2811255831 | segment bisector | a segment, ray, line, or plane that intersects a segment at its midpoint |  | 13 |
| 2811256781 | ray | a part of a line that starts at one endpoint and extends forever |  | 14 |
| 2811256782 | angle | A figure formed by two rays with a common endpoint |  | 15 |
| 2811257130 | vertex | A point where two or more straight lines meet. |  | 16 |
| 2811257131 | degree | a unit used to measure angles, equal to 1/360th of the circumference of a circle | 17 | |
| 2811257581 | right angle | an angle that measures exactly 90 degrees |  | 18 |
| 2811257582 | acute angle | an angle that measures less than 90 degrees | | 19 |
| 2811258031 | obtuse angle | an angle that measures greater than 90 degrees and less than 180 degrees |  | 20 |
| 2811258032 | adjacent angles | Angles that have a common side and a common vertex (corner point). |  | 21 |
| 2811258621 | linear pair | a pair of adjacent angles whose non-common sides are opposite rays |  | 22 |
| 2811260067 | vertical angles | two nonadjacent angles formed by two intersecting lines |  | 23 |
| 2811260068 | complementary angles | have a sum of 90 degrees |  | 24 |
| 2811261161 | supplementary angles | have a sum of 180 degrees |  | 25 |
| 2811261162 | perpendicular | Intersecting at or forming right angles |  | 26 |
| 2811261602 | polygon | A closed plane figure formed by three or more line segments that intersect only at their endpoints. |  | 27 |
| 2811262051 | vertex of a polygon | the point where two sides of a polygon meet |  | 28 |
| 2811263657 | equilateral polygon | a polygon with all sides congruent |  | 29 |
| 2811263658 | regular polygon | a polygon that is both equilateral and equiangular | | 30 |
| 2811264286 | perimeter | The sum of the lengths of the sides of a polygon. |  | 31 |
| 2811264287 | circumference | The distance around a circle | 32 | |
| 2811264954 | area | The number of square units needed to cover a given surface |  | 33 |
| 2811265615 | polyhedron | a solid figure bounded by plane polygons or faces |  | 34 |
| 2811265616 | face | a polygon side of a solid figure |  | 35 |
| 2811266247 | edge | The line along which two surfaces of a solid meet. |  | 36 |
| 2811266826 | prism | A solid figure that has two congruent, parallel polygons as its bases. Its sides are parallelograms |  | 37 |
| 2811267575 | pyramid | A solid shape with a polygon as a base and triangular faces that come to a point (vertex or apex) |  | 38 |
| 2811267576 | cylinder | a solid with congruent circular bases that lie in parallel planes |  | 39 |
| 2811267946 | cone | A solid figure that has a circlular base and a single vertex. | 40 | |
| 2811267947 | sphere | A solid shape that is perfectly round like a ball. No faces, edges, or vertices. |  | 40 |
| 2811269002 | regular polyhedron | a convex polyhedron in which all of the faces are congruent regular polygons |  | 41 |
| 2811269407 | surface area | the sum of the areas of all the faces of a solid figure |  | 42 |
| 2811269003 | Platonic solid | a convex polyhedron in which all of the faces are congruent regular polygons |  | 43 |
| 2811269879 | volume | Amount of space an object takes up | 44 | |
| 2813983465 | net | a 2-dimensional diagram that can be folded to forma a 3-dimensional shape | 45 |
