Geometry
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32 terms
Terms | Definitions |
|---|---|
 Congruent line segments | Line segments with the same length |
| Plane | A flat surface that extends forever in all directions |
| Skew Lines | lines that lie in different planes. they are neither parallel or intersecting |
| Angle | Formed by two rays that have the same endpoint |
| Congruent Angles | Angles that have the same measure |
| Vertical Angles | opposite angles formed by two intersecting lines |
| Adjacent Angles | are a pair of angles with a common vertex and a common side, but no common interior points |
| Complementary Angles | Two angles whose sum is 90° |
| Supplementary Angles | Two angles whose sum is 180° |
| Construction | is a geometric drawing made with just two tools |
| Perpendicular Bisector | A line that is perpendicular to a segment at its midpoint. |
| Angle Bisector | a ray that divides an angle into two congruent angles |
| triangle | 3 sided polygon |
| quadrilateral | a four-sided polygon |
| pentagon | a polygon with 5 sides |
| hexagon | a polygon with 6 sides |
| heptagon | A polygon with 7 sides |
| octagon | an eight-sided polygon |
| nonagon | A polygon with 9 sides |
| decagon | a polygon with 10 sides |
| dodecagon | A polygon with 12 sides |
| diagonal | is a line segment that connects two vertices of a polygon and is not a side |
| regular polygon | a polygon with all sides and all angles equal |
| radius | is any line segment that connects the center to a point on the circle |
| central angle | is an angle whose vertex is the center |
| diameter | is any line segment through the center that connects the center to a point on the circle |
| arc | is a part of a circle connecting two points of the circle |
| sector | is a region bounded by two radii and an arc. The shaded region is a sector |
| chord | is any line segment that connects two points on the circle |
| semicircle | An arc that connects the endpoints of a diameter |
| Congruent figures | have the same size and shape |
| Similar Figures | have shape but they don't have the same size |
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