Point, Has no length, width or thickness, Ray, Part of a line that has one endpoint and goes on infinitely in only one direction , Line segment, A part of a line that is bounded by two distinct end point and contains every point on the line that is between its endpoint., Plane, A two-dimensional analogue of a point (zero dimensions), a line (one dimension) and three-dimensional space., Right angle, An angle of exactly 90°., Acute angle, An angle that measures between 90° and 0°., Complementary, The complement is the amount you must add to something to make it "whole"., Supplementary, Two angles or arcs whose sum is 180 degrees., Perpendicular, Lines that intersect at a right (90 degrees) angle., Adjacent angles, Two angles that have a common vertex and a common side but do not overlap..

Familiarizing Geometry Terms

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