Chapter 2 vocab
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Created by:
melenellen on September 16, 2009
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24 terms
Terms | Definitions |
|---|---|
 Right angle | a 90 degree angle |
| Obtuse Angle | an angle between 90 and 180 degrees |
| Acute Angle | an angle less than 90 degrees |
| Straight angle | an angle equal to 180* |
| Adjacent angles | 2 coplanar angles that share a vertex and a side, do NOT overlap. |
| Linear Pair | Formed by 2 adjacent angles, when their non-shared sides form a straight angle. |
| Perpendicular | 2 line segments/rays intersect to form right angles. |
| Vertical Angles | Non adjacent, non-overlaping angles formed by 2 intersecting lines. |
| Complements | 2 angles that add up to 90* |
| Supplements | 2 angles that add up to be 180* |
| Triangle | Formed by 3 segments with endpoints that are 3 noncollinear points. |
| Vertices | Plural of vertex, Triangles have 3. |
| Sides | Segments that form the triangle. |
| Polygon | a closed plane figure with straight sides |
| diagonal | a straight line connecting any two vertices of a polygon that are not adjacent |
| consecutive sides | sides in a polygon that are connected by a vertex |
| consecutive angles | angles of a polygon that share a side |
| regular polygon | a polygon with all sides and all angles equal |
| equiangular polygon | A polygon with congruent angles |
| equilateral polygon | A polygon with all sides being equal |
| convex | opposite of concave |
| concave | A polygon that can have a line drawn outside the figure (not intersecting with the figure) that can connect two vertices |
| quadrilateral | A polygon with four sides |
| pentagon | A polygon with 5 sides |
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