In practical application, the angle of an integer is accurate enough. Sometimes more accurate measurements are needed, such as astronomy or the latitude and longitude of the earth. In addition to expressing degrees in decimals, degrees can be subdivided into minutes and seconds: 1 degree is 60 minutes (60') and 1 degree is 60 seconds (60 "). For example, 40.1875 = 4011'15 ". To be more accurate, seconds are expressed in decimals instead of adding units.
Extended data:
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. In addition to 1 and ego, 360 has 2 1 real factors (2, 3, 4, 5, 6, 8, 9, 10, 12, 15,15.
Conversion relationship of time units:
(1) One day = 1440 minutes, 1 hour =60 minutes, 1 minute =60 seconds.
(2) A moment = 15 minutes, and a word =5 minutes (used in southern Fujian and Guangdong).
Angle relation of each pointer of the clock:
(1) An ordinary clock is equivalent to a circle, and its hour hand or minute hand is equivalent to walking 360 degrees.
(2) The angle of each large grid on the clock is 30.
(3) The angle of the hour hand every 1 min should be 0.5.
(4) The angle of minute hand per 1 min should be: 6.
Baidu Encyclopedia-Angle