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1
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a zero-dimensional figure; while usually left undefined, has four main representions
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2
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aka line segment; the set of points consisting of two distinct points and all inbetween them
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4
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non-coplanar lines that don't intersect
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7
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nonstraight and nonzero angles that have a common side in the interior of the angle formed by the noncommon sides
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8
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one-dimensional figure that consists of one endpoint A, one point B, all of the points on , and all points for which B is between them and A
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10
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the angle opposite one of the equilateral sides in an isoscoles triangle
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12
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the amount of space a 3-D object can hold
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15
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important mathematical statements which can be proven by postulates, definitions, and/or previously proved theorems
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17
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the union of 2 rays that have the same endpoint; measured in degrees or radians
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19
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two-dimensional group of points that goes on infinitely in all directions
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20
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measure of the tilt of a line; rise over run
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