Answer: Ο/180Step-by-step explanation:510 Degree (Β°) =. 8.90118 Radian (rad) Degree : A degree, a degree of arc or arc degree is a measurement of plane angle, on behalf of 1/360 of a full rotation. The symbol for degree is Β°. It is not an SI unit, however, it is accepted for use with SI. One degree is equal to Ο/180 radians.