 For this purpose it is divided into 360 equal parts, called degrees, each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. The degrees, minutes, and seconds, are marked thus, °, ', " ; and 9°...  First Lessons in Geometry: With Practical Applications in Mensuration, and ... - Page 20by Charles Davies - 1840 - 252 pagesFull view - About this book
 | Holbrook Lynedon Horton - Mathematics - 1999 - 706 pages
...into 360 equal parts called degrees; so that the angle which each part subtends is equal to a degree. Each degree is divided into 60 equal parts called minutes and each minute is divided into 60 equal parts called seconds. ln the circular system of measure the unit is the radian.... | |
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