Line segment - Formed by joining two points (ends at the two endpoints), Line - Indefinite length; extends beyond two points, Ray - Only one endpoint; extends indefinitely in one direction, Plane - A flat 2D surface, Collinear - Points that lie on the same line, Point of intersection - Point where two lines meet each other, Perpendicular lines - Lines intersecting at right angle, Parallel lines - Lines that never intersect, Acute angle - Angle between 0 and 90 degrees, Right angle - 90 degrees angle, Obtuse angle - Angle between 90 and 180 degrees, Straight angle - 180 degrees angle, Reflex angle - Angle between 180 and 360 degrees, Complementary angles - Angles that add up to 90 degrees, Supplementary angles - Angles that add up to 180 degrees,

Basic Geometry: Know your Terms!

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