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15 Cards in this Set

  • Front
  • Back
Ray
Part of a line that consists of a point and then continues on.
Angle
Two different rays with a common end point. Also called 'vertex'
Sides of an angle
The rays protruding from the point.
Vertex of an angle
In an angle, the endpoint is the vertex of the angle.
Acute Angle
An angle less than 90 degrees
Right angle
An angle that measures 90 degrees.
Obtuse Angle
An angle measuring more than 90 degrees, and less than 180.
Straight Angle
Measures 180 degrees (straight line)
Complementary Angles
Two angles who add up to 90 degrees
Supplementary Angles
Two angles that add up to 180 degrees.
Adjacent Angles
Two angles that share a common vertex or side but have no common interior angles.
Vertical Angles
Two angles are vertical angles if their sides from two pairs of opposite rays.
Congruent Angles
Angles that have the same measurment.
Angle Bisector
A ray that divides an angle into two angles that are congruent.
Perpendicular Bisector
A ray, line, or segment that is perpendicular to another segment. Also splits the second segment in half