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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.
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Share
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.
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