noun🔗Share弧度 In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad"The pizza slice measured an angle of 0.5 radians, meaning the crust's length was half the pizza's radius. "这块披萨的角度是0.5弧度，也就是说，披萨饼皮的长度是披萨半径的一半。mathphysicstechnicalunitChat with AIVocabulary GamePractice Reading
