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Right Angle
An angle that measures 90 degrees
Supplementary Angles
Two angles whose sum is 180 degrees
Complementary Angles
Two angles whose sum is 90 degrees
Adjacent Angles
Two angles that share a common side and have the same vertex
Vertex
A point where two or more straight lines meet.
Angles on a Line
The measurements of all angles on a line with a common vertex; the sum is 180 degrees
Congruent
Having the same measurement
Vertical Angles
Two angles formed by two intersecting lines. They are always congruent.
Straight Angle
An angle that measures exactly 180 degrees, forming a straight line.
Triangle
A three-sided polygon with three angles.
Circle
A round shape with all points equidistant from the center.