Since a full turn is 360°, 1° would be equal to 1/360 of a full turn.
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The answer depends on the unit of measurement for 1. 1 radian is 1/(2*pi) of a full turn.
1/2
1/360
1/360 There are 360 degrees in a full turn
180 degrees is half of a full turn, which is equivalent to 1/2 of a turn. This is because a full turn is 360 degrees, so half of that would be 180 degrees. Therefore, 180 degrees can be expressed as the fraction 1/2 when referring to a complete turn.