Right angle measure of angle
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In geometry and trigonometry, a right angle is an angle of exactly 90° (degrees), corresponding to a quarter turn.
measures of angles :
Angles can be either straight, right, acute or obtuse. An angle is a fraction of a circle where the whole circle is 360°. A straight angle is the same as half the circle and is 180° whereas a right angle is a quarter of a circle and is 90°. You measure the size of an angle with a protractor.
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Right Angle measure = 90 degree
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