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4.5.1 Angle Vocab

Vocabulary

WordDefinition
Point- an exact location in space
Line- a straight path of points that goes on and on in two directions
Line Segment- a part of a line that has two endpoints
Ray- a part of a line that has one endpoint and continues endlessly in one direction
Angle- a figure formed by two rays that have the same endpoint
Acute Angle- an angle that measures less than 90 degrees
Right Angle- an angle that measures exactly 90 degrees and forms a square corner
Obtuse Angle- an angle that measures greater than 90 degrees
Perpendicular Lines- two intersecting lines that form right angles
Parallel Lines- in a plane, lines that never intersect
Vertex- the point where two or more edges, line segments or rays meet
Degree- a unit of measure for angles
Protractor- a tool used to measure and draw angles
Adjacent Angles- angles that have a common side and vertex
Complementary Angles- two angles whose degree measures have a sum of 90 degrees
Supplementary Angles- two angles whose degree measures have a sum of 180 degrees
Created by: sarahhooker
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