A right angle is an angle of radians; two nonzero vectors meet at a right angle exactly when their inner product is zero.
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A right angle is an angle that measures exactly 90 degrees (°) or \( \frac{\pi}{2} \) radians. It is one of the fundamental angles in geometry and is typically represented by a small square at the vertex of the angle. Right angles are commonly encountered in various geometric shapes, such as squares and rectangles, where the corners form right angles.