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Basic Geometry Vocab

TermDefinition
Point An exact position or location
Line A series of points extending infinitely in both directions
Line Segment A portion of a line with two endpoints
Ray A series of points that extends infinitely in one direction
Vertex The shared point of an angle's rays
Angle Two rays that share a common point
Acute Angle An angle that is less than 90 degrees
Right Angle An angle that measures exactly 90 degrees
Obtuse Angle An angle that measures more than 90 degrees but less than 180 degrees
Straight Angle An angle that measures exactly 180 degrees
Parallel Lines Lines or segments that do not cross
Perpendicular Lines Lines that form right angles when they intersect
Intersecting Lines Lines that cross one another
Polygon A shape with corners and edges
Triangle A three sided polygon with an interior angle sum of 180 degrees
Quadrilateral A four sided polygon with an interior angle sum of 360 degrees
Curve A continuously flowing line without sharp angles
Circle A curved shape with all points equidistant from the center
Horizontal Line A line that goes left to right
Vertical Line A line that goes up and down
Created by: user-2059999
 

 



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