| A | B |
|---|
| collinear points | two or more points that lie onthe same line |
| coplanar points | three or more points that lie on the same plane |
| parallel lines | two or more lines in a plane that do not intersect |
| perpendicular lines | two lines that intersect to form a right angle |
| complementary angles | two angles whose measures ahve a sum of 90 |
| supplementary angles | two angles whose measures have a sum of 180 |
| convex polygon | a polygon in which no segment connecting two vertices is outside the polygon |
| concave polygon | a polygon in which at least one segment connecting two verticies is outside the polygon |
| pentagon | five sided polygon |
| hexagon | six sided polygon |
| heptagon | seven sided polygon |
| nonagon | nine sided polygon |
| decagon | ten sided polygon |
| undecagon | eleven sided polygon |
| dodecagon | twelve sided polygon |
| consecutive vertices | two vertices of a polygon connected by a side |
| consecutive sides | two sides of a polygon that share a common vertex |
| consecutive angles | two angles of a polygon that share a common side |
| diagonal of a polygon | a segment connecting any two non-consecutive vertices |
| equilateral polygon | a polygon whose sides are equal in measure |
| equiangular polygon | a polygon whose angles are equal in measure |
| regular polygon | a polygon that is both equilateral and equiangular |
| vertical angles | two angles that only share a vertex and are created by two intersecting lines |
| linear angles | two angles created by a line and a ray |
| polygon | a closed geometric figure ina plane formed by connecting line segments endpoint to endpoint |
| side | each line segment of a polygon |
| vertex | endpoints where the sides of a polygon meet |
| triangle | a three sided polygon |
| quadrilateral | a four sided polygon |
| n-gon | a polygon with n sides |
