Once the pronunciation was yρdμ, a Chinese character, which means a unit for measuring the running distance of the sun, moon and stars; On one occasion; Once; One pass. Degree, crossing; Sing it according to the ready-made music; Refers to temperature, angle, latitude and longitude, electricity and other units.

Degree is the unit of angle in mathematics and geometry, which judges the size of angle. A circle is evenly divided into 360 parts, each part is 1 degree. The degree is written as 1 minute in mathematics, which can be divided into 60 parts, one of which is 1 minute.

Namely: 1 = 60'.