Question

what fraction of a complete angle is a right angle?​

Answer 1

Answer:

An angle equal to 14 turn (90° or π2 radians) is called a right angle. Two lines that form a right angle are said to be normal, orthogonal, or perpendicular. Angles larger than a right angle and smaller than a straight angle (between 90° and 180°) are called obtuse angles ("obtuse" meaning "blunt").

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