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PG - Segments, Angles and Angle Pairs
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Terms in this set (24)
Supplementary Angles
Two angles that add up to 180 degrees. The angles are supplements of each other.
Complementary Angles
Two angles that add up to 90 degrees. The angles are complements of each other.
Vertical Angles
Two angles that are formed by intersecting lines and are opposite of each other. Their measures are equal.
Linear Pair
Two angles that form a line. These angles are supplementary.
Adjacent Angles
Two angles that are next to each other and share a common side.
Midpoint
The exact middle point of a segment.
D is the midpoint in the diagram.
Bisect
To split equally into two.
The segment in the diagram is bisected. The two pieces are congruent.
Length
The measurement of a segment.
Congruent
Exactly the same.
Segment Bisector
A line or segment that splits another segment into two equal parts.
Acute angle
An angle whose measure is greater than 0 degrees and less than 90 degrees.
Right angle
An angle whose measure is 90 degrees.
Obtuse angle
An angle whose measure is larger than 90 degrees and smaller than 180 degrees.
Degree
The units we measure angles with.
Straight Angle
An angle whose measure is 180 degrees. Formed by two opposite rays and makes a line.
Angle
The figure formed when two rays share a common endpoint.
Exterior of an Angle
The set of all points on the outside of an angle.
Interior of an Angle
The set of all points inside the angle.
Vertex
The common endpoint of an angle.
Protractor
The tool used to measure angles.
Segment Addition Postulate
This states that if a segment is cut into two pieces, then the two pieces add up to the whole segment
Angle Addition Postulate
This states that if an angle is cut into two pieces, then the two pieces add up to the whole angle.
Angle Bisector
A line, segment or ray that splits an angle exactly in half.
Sides of an Angle
The rays that make up an angle. Each angle has two sides.
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