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Geometry Quiz #3

Terms to know for Geometry Quiz #3

TermDefinition
Collinear Points Points that lie on the same straight line or in a single line.
Coplanar Points that lie on the same plane.
Line Segment Part of a line that consists of two points, called endpoints.
Ray Part of a line that consists of a point called an initial point.
Intersect/Bisect When two geometric figures have one or more points in common. These points are called points of intersection (HALFS ARE EQUAL- to divide into two congruent points).
Segment Addition Postulate AC + CB = AB
Congruent Segments AB = AD refers to the length of the segment, while AB = AD with an ñ above it refers to the segments being equal.
Acute Angle Less than 90 degrees.
Right Angle 90 degrees.
Obtuse angle Between 90-180 degrees.
Straight Angle Exactly 180 degrees.
Reflex Angle Between 180-360 degrees.
Adjacent They share a common vertex and side, but NO common interior points.
Midpoint The point that divides the segment into two congruent segments.
Angle Bisector A ray that divides an angle into two adjacent angles that are congruent.
Vertical Angles Angles formed by two intersecting lines. Meaning, they share a common vertex and are across from each other. They also have the same measurement, since they are congruent.
Supplementary Angles Two angles that add up to 180 degrees.
Linear Pair If two adjacent angles are supplementary, then they are a linear pair (form a straight line).
Complementary Angles Two angles that add up to 90 degrees.
Created by: abeutner26
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