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Definition
| a closed plane figure formed from three or more segments such that each segment intersects exactly two other segments, one at each endpoint, and no two segments with a common endpoint are collinear |
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Definition
| a polygon in which any line segment that connects two vertices of the polygon passes only through the polygon’s interior |
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Definition
| a polygon in which at least one line segment that connects two vertices of the polygon passes through the polygon’s exterior (a polygon that is not convex) |
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Definition
| a polygon for which all interior angles have the same measure |
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Definition
| a polygon for which all segments have the same measure |
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Definition
| a polygon that is both equiangular and equilateral |
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Term
| center (of a regular polygon) |
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Definition
| the point that is equidistant from all vertices of a regular polygon |
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Term
| central angle (of a regular polygon) |
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Definition
| an angle whose vertex is the center of a regular polygon and whose sides pass through adjacent vertices of the polygon |
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Term
| interior angle (of a polygon) |
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Definition
| an angle whose vertex is a vertex of a polygon and whose two sides are defined by segments that share that vertex |
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Term
| exterior angle (of a polygon) |
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Definition
| an angle that forms a linear pair with an interior angle of a polygon |
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Definition
| two lines that intersect to form a right angle |
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Definition
| two coplanar lines that do not intersect |
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Definition
| the “steepness of a line,” which is calculated by dividing the change in the y-coordinate (often called “the rise”) by the change in the x-coordinate (often called “the run”) between any two points on the line; it represents the rate of change of the y value with respect to the x value |
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Term
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Definition
| the point on a segment that is equidistant from the segment’s two endpoints |
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