what is right angel
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In geometry and trigonometry, a right angle is an angle of exactly 90° (degrees), corresponding to a quarter turn. If a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles.
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A right angle is an angle that measures 90°. ... The sides of a square and a rectangle always form a right angle with each other. Also, the diagonals of a square intersect each other at right angles. In trigonometry, it is also represented by π/2.
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