unit 1 basic geometry vocab
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Last updated 2:35 PM on 2/10/23
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22 Terms
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Congruent angles
2 or more angles that are identical to each other
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Point
A location with no size or shape.
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Line
Made up of points with no thickness or width; Extends indefinitely in both directions.
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Line Segment
A measurable part of a line consisting of two endpoints.
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Ray
A line that extends indefinitely in one direction.
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Vertex
The common endpoint of an angle. (Where the sides intersect.)
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Acute Angle
An angle with a degree measure less than 90°.
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Obtuse Angle
An angle with a degree measure greater than 90°.
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Right Angle
An angle with a degree measure of 90°.
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Straight Angle
An angle with a degree measure of 180°.
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Parallel Lines
Two lines that never intersect. //
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Perpendicular
Two lines that intersect at a 90° angle.
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Adjacent Angles
Two angles that share a common vertex and side.
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Vertical Angles
Congruent angles that are across from each other on intersecting lines.
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Complementary angles
Two angles with measures that have a sum of 90°.
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Supplementary angles
Two angles with measures that have a sum of 180°.
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Linear Pair
Adjacent angles that are supplementary.
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Angle
The intersection of two rays at an endpoint.
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Angle Bisector
A line or ray that divides an angle into two equal parts.
symbol: ))
symbol: ))
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Angle addition postulate
the sum of the measure of 2 adjacent angles is equal to the measure of the angle formed by the noncommon sides of 2 adjacent angles
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segment bisector
divides the line into 2 equal parts
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perpendicular bisector
cuts a line segment into two equal parts at 90° ( ⊥ )
(mid points)
* breaks like into equal points
(mid points)
* breaks like into equal points
Note 
Flashcards (165)