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### 18 Cards in this Set

• Front
• Back
 Line A set of points that extends indefinitely in oppsite directions Acute Angle Less than 90 degree Obtuse Angel More than 90 degree and less than 180 degree Line Segment A part of a line consisting of two end points and all the points between them. Ray A part of a line that has one denpoint and extends indefinitely in one direction Parallel Lines Two lines on the same plane that do not intersect. Intersecting lines Two lines in the same plane that meet at a point. Angle A figure formed by two rays and a common endpoint, the vertex Vertex A point where the sides of an angle meet. Acute angle An angle with a measure between 0 and 90 degree <0 and 90> Obtuse angle An angel with a measure between 90 and 180 degree Right angle An angle with a measure of exactly 90 degree Straight angle An angle with a measure of exactly 180 degree (Line) Adjacent angle Two angles that share a vertex and a common side Vertical angles Opposite angles formed by two intersecting lines. Their measures are the same Complementary Angles Two angles whose measures have a sum 90 degree Supplementary Angles Two angles whose measures have a sum of 180 degree Perpendicular Lines Two lines that intersect and form 90 degree angles at their intersection.