Convert angles between degrees, radians, gradians and turns instantly and accurately.
基准单位:度 (°)
1 弧度 (rad) = 180/π ° ≈ 57.2958°
1 梯度 (grad) = 0.9°(直角 = 100 grad)
1 转 (rev) = 360°
常用:30°=π/6;45°=π/4;60°=π/3;90°=π/2;180°=π
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