In this method the right angle is divided into 90 equal parts, each of which is called a degree. Each degree is subdivided into 60 equal parts, each of which is called a minute. Trigonometry and Double Algebra - Page 3by Augustus De Morgan - 1849 - 167 pagesFull view - About this book
| John Bascombe Lock - Logarithms - 1896 - 147 pages
...to draw. (iii.) It is an angle whose size is very familiar. 13. The right angle is divided into 90 **equal parts, each of which is called a degree ; each degree is** subdivided into 60 equal parts, each of which is called a minute ; and each minute is again subdivided... | |
| George Kish - Science - 1978 - 453 pages
...whence it is clear that in the entire zodiac there are 360 degrees. Also, according to astronomers, **each degree is divided into 60 minutes, each minute into 60 seconds,** each second into 60 thirds, and so on. And as the zodiac is divided by astronomers, so each circle... | |
| John Horton Conway, Richard Guy - Mathematics - 1996 - 310 pages
...seems that the Babylonians divided a complete circle into 360 degrees (°). In the Babylonian manner, **each degree is divided into 60 minutes ('), each minute into 60 seconds** ("), each second into 60 thirds ('"), and so on. Again, it is because mathematical and astronomical... | |
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