Geometry Definitions
Definitions for Geometry
Terms
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- Supplementary Angles
- Supplementary angles are angles with measures that add to 180 degrees
- Distance Between Two Points
- The distance between two points is the length of the line segment joining the points
- Angle Bisector
-
Ray OR is the bisector of
- Ray
- A ray is a part of a line consisting of a given point, called an end point, and set of all points on one side of the end point
- Vertical Angles
- Vertical angles are a pair of non-adjacent angles formed by intersecting lines
- Right Angle
- A right angles is an angle with a measurement of 90 degrees
- Obtuse Angle
- An obtuse angle is an angle with a measurement of greater than 90 degrees and less than 180 degrees
- Angle
- An angle is the union of two rays having the same endpoint. The end point is called the vertex of the angle; the rays are called the sides of the angle
- Acute Angle
- An acute angle is an angle with a measurement of less than 90 degrees
- Congruent Line Segments
- Congruent line segments are line segments that have equal lengths
- Linear Pair
- A linear pair is two adjacent angles whose exterior sides form a straight line
- Distance Between a Line and a Point not on a Line
- The distance between a line and a point not on the line is the length of the perpendicular segment drawn from the point to the line
- Congruent Angles
- Congruent angles are angles that have equal measures
- Betweeness of Rays
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Ray PS is between rays PQ and PR. If point S lies in the interior of
- Midpoint of a Line Segment
- The midpoint of a line segment is the point that divides the line segment into two congruent line segments
- Line Segment
- A line segment is a part of a line consisting of two points called end points and the set of all points between them
- Adjacent Angles
- Adjacent angles are angles that have the same vertex, share a common side, and have no interior points in common
- Line Bisector
- A bisector of line AB is any line, ray, or line segment which passes through the midpoint of line AB
- Complementary Angles
- Complementary angles are angles with measures that add to 90 degrees
- Betweeness of Points
- If F, G, and H are collinear and FG + GH = FH, then G is between F and H
- Perpendicular Bisector
- A perpendicular bisector is a line that is perpendicular to a line segment and intersects the line segment at its midpoint
- Perpendicular Lines
- Perpendicular lines are lines which intersect to form right angles
- Collinear Points
- Collinear points are points that lie on the same line
- Noncollinear Points
- Noncollinear points are points that do not lie on the same line