Right angle, Angle

The right angle = 1/4 full circle = 3/2 babylonian unit = π/2 rad = 100 gon = 90° is the unit used in Euclid's Elements. Read more >>

I want to convert:

Degrees
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Radians
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Circle
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Turn
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Cycle
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Rotation
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Revolution
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Right angle
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Mil (NATO)
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Mil (Soviet Union)
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Mil (Sweden)
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Grad
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Gon
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Point
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Hour angle
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An angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. Angles provide a means of expressing the difference in slope between two rays meeting at a vertex without the need to explicitly define the slopes of the two rays. Angles are studied in geometry and trigonometry. Read more >>