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22 Cards in this Set
- Front
- Back
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polygon
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the union of three or more coplanar segments in which exactly two segments intersect at each endpoint
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sides
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segments of a polygon
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vertices
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endpoints of the segments
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tri
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3
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quad
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4
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penta
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5
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hexa
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6
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hepta
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7
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octa
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8
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nona
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9
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deca
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10
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undeca
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11
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dodeca
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12
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how many sides does a hexagon have?
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5
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how many angles are there inside a nonagon?
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9
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what is a polygon with twelve sides called?
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dodecagon
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concave
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has at least one diagonal that lies outside the polygon
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convex
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all diagonals inside the polygon
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theorem 5.1
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180[n-2]= sum of interior angles of a convex polygon
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theorem 5.2
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the sum of the measures of the exterior angles, one at each vertex, for any convex polygon is 360 degrees
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theorem 5.3
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every interior angle of a regular n-gon measures (180[n-2])/n
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theorem 5.4
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every exterior angle of a regular n-gon measures 360/n
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