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Point
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A location that has no size
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Line
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A straight path that has no thickness and extends forever
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Plane
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A plane is a flat surface that has no thickness and extends forever
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Segment
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A segment, or like is the part of a line consisting of two points and all points between them
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Endpoint
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A point at an end of a segment or the starting point of a ray
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Ray
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A ray is a point of a line that starts at an endpoint and extends forever in one direction
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Opposite rays
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Opposite rays are two rays that have a common endpoint and form a line
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Adjacent angles
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Two angles in the same place with a common vertex and common side, but no common interior points
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Linear pair
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A pair of adjacent angles whose noncommon sides are opposite rays
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Complementary angles
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Two angles whose measures have a sum of 90 degress
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Supplementary angles
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Two angles whose measures have a sum of 180 degress
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Vertical angels
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Two nonadjacent angles formed by two interesecting lines
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Collinear
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Points that line on the same line
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Noncollinear
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Points that do not lie on the same line
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Coplanar
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Points or lines that lie in the same plane
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