A circle is 360, expressed in radians as 2π, then1= 2π * (1/360) = π/180, then n = n * (π/ 180).

1 degree =60 minutes, 1 minute =60 seconds, the angle is the unit for measuring the angle, and the symbol is "0". A fillet is divided into 360 equal parts, and each part is defined as 1 degree (1 degree). In the angle system, 1 = 60',1'= 60 ",1'=( 1/60),1"= (1/60)', use.

Angular unit

Angle is the unit for measuring angle, and the symbol is "0". A fillet is divided into 360 equal parts, and each part is defined as 1 degree (1 degree). The value of 360 is adopted because it is easily divisible. 360 Besides 1 and ego, there are 22 real factors (2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24.