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Properties of Lines and Angles

Indicates a location. It has no size. Name it by a capital letter. Point
It's a series of points that extend in two opposite directions without end. Name it by any two points or by a lowercase letter. Line
Part of a line with two endpoints and all the points in between. Name it by its endpoints Segment
Lines that have exactly one point in common. Intersecting
Lines that never intersect. Parallel
Lines that intersect to form a 90 degree angle. Perpendicular
Between 0 and 90 degrees Acute
90 degrees Right
Between 90 and 180 degrees Obtuse
180 degrees Straight
Names of angles spell SOAR
What angles are two angles whose sum is 180 degrees. Supplementary
What angles are two angles whose sum is 90 degrees. Complementary
What angles are angles that share a common vertex and side. Adjacent
_________ angles are formed by two intersecting lines. They are ____________ each other. The measures of vertical angles are __________________________. Vertical, opposite, the same or congruent.
Created by: IsabelleC