Acute angle, Less than 90 degrees, Obtuse angle, More than 90 degrees, less than 180 degrees, Reflex angle, More than 180 degrees, less than 360 degrees, A straight line, 180 degrees, A right angle, 90 degrees exactly, A quarter turn, 90 degrees, Half turn, 180 degrees, Three quarter turn, 270 degrees, A full turn, 360 degrees, Angles are measured in, Degrees, An angle is, the turn between 2 lines

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