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Geometry
Holt Mathematics Course 3 Chapter 7 Vocabulary partial
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Gravity
Terms in this set (20)
Line
A perfectly straight path that extends forever in both directions
Ray
A part of a line that starts at one point and extends forever in one direction.
Segment (Line Segment)
The part of a line between two points
Vertex
A point where two lines meet to form an angle
Angle
A figure that is formed by two rays with a common endpoint called the vertex.
Right Angle
An angle that measures 90 degrees
Acute Angle
An angle that measures greater than 0 degrees and less than 90 degrees
Obtuse Angle
An angle that measures greater than 90 degrees and less than 180 degrees
Complementary Angles
Two angles whose measures add to 90 degrees
Supplementary Angles
Two angles whose measures add to 180 degrees
Congruent
Having the same size and shape
Vertical Angles
A pair of nonadjacent congruent angles formed by intersecting lines
Straight Angle
An angle that measures 180 degrees
Adjacent Angles
A pair of angles that have a common vertex and a common side
Parallel Lines
Lines in a plane that never meet
Perpendicular Lines
Lines that intersect at right angles
Transversal
A line that intersects 2 or more parallel lines
Corresponding Angles
When parallel lines are cut by a transversal, the angles that are in the same position. They are congruent.
Alternate Interior Angles
Angles that are inside the parallel lines and on opposite sides of the transversal. They are congruent.
Alternate Exterior Angles
Angles that are outside the parallel lines and on opposite sides of the transversal. They are congruent.
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