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Geometry Revision

Revision of into to geometry concepts in prep for Christmas tests

TermDefinition
Point of intersection Where 2 or more lines, line segments or rays meet or cross
Collinear points Points that lie on the same line
Vertex Point where 2 rays meet to form an angle
Acute angle Angle of less than 90 degrees
Right angle Angle of 90 degrees
Obtuse angle Angle greater than 90 but less than 180 degrees
Straight angle Angle of 180 degrees
Reflex angle Angle greater than 180 but less than 360 degrees
Full angle Angle of 360 degrees
Null angle Angle of 0 degrees
Ordinary angle Angle less than 180 degrees
Supplementary angles 2 angles that sum to 180 degrees
Perpendicular lines Lines that meet at right angles to each other
Parallel lines Lines that are equal distance apart and never meet
Bisector Line that cuts an angle into 2 equal parts
Created by: Ms McEntee
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