Supplementary Angles, A+B = 180 Degree, Complementary Angles, A+B = 90 Degree, Vertical Angles, Elements of an Angle, Two Segments and Vertex, Straight Angle, 180 Degree, Reflex Angle, More than 180Degree, Acute Angle, Less than 90Degree, Obtuse Angle, Between 90 and 180 Degree

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