Point - an exact location, Line - a straight path that point in opposite directions, Line segment - a part of a line with two endpoints, Ray - a part of a line with one endpoint and one arrow, Right angle - 90 degrees, Acute angle - less than 90 degrees, Obtuse angles - Greater than 90 degrees, Straight angle - 180 degrees (straight line), Protractor - tool to measure angles, Angles add up to 90 degrees - complimentary angles, Angles add up to 180 degrees - supplementary angle, Angle between 180 and 360 degrees - reflex angle, 2 rays that meet at a common point (the vertex) - definition of angle,

Lines, Rays, Angles

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