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Points B and C are said to be on the same side of point A if A, B, C are collinear and point A is not between point B and C.
A Ray is a set of points consisting of a fixed point of a line and all the points of the line on the same side of the fixed point.
Opposite Rays are two rays of the same line that have a common endpoint and no other point in common.
A point P lies in the interior of an angle if there exist two points, one on each ray, neither at the vertex, such that the point P is between said two points.
The midpoint of a line segment is a point of the line segment such that 2 segments formed are congruent.
Line Segment Bisector
A line segment bisector is a line that intersects the line segment at its midpoint.
An obtuse angle is an angle measuring greater than 90 degrees but less than 180 degrees
An angle bisector is a ray whose endpoint is the vertex of the angle and that forms 2 congruent angles
A point of the line segment that forms 2 congruent segments is the midpoint of the line segment
Reversed line segment bisector
A line that intersects the midpoint of a line segment is a line segment bisector
Reversed angle bisector
A ray whose endpoint is the vertex of the angle and that forms two congruent angles is an angle bisector.
Adjacent angles are two angles in the same plane that share a common vertex and a common ray but share no other points.
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