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
| THOMAS KENTISH - 1852
...TRIGONOMETRY. THE circumference of a circle is supposed to be divided into 360 equal parts, called degrees. **Each degree is divided into 60 minutes; each minute into 60 seconds;** and so on. Degrees are marked with a small ° at the top of the figure, minutes with ', seconds with... | |
| James Hann - Plane trigonometry - 1854 - 119 pages
...estimating angular measures, we suppose the right angle to be the primary one, and to be divided into 90 **equal parts, each of which is called a degree; each degree is** supposed to be divided into 60 equal parts, each of which is called a minute ; each minute is supposed... | |
| Thomas Kentish - 1854
...TRIGONOMETRY. THE circumference of a circle is supposed to be divided into 360 equal parts, called degrees. **Each degree is divided into 60 minutes ; each minute into 60 seconds** ; and so on. Degrees are marked with a small ° at the top of the figure, minutes with ', seconds with... | |
| Richard Dunkley Beasley - Plane trigonometry - 1858 - 106 pages
...convenient to divide it. In England we divide the right angle into 90 equal parts called degrees ; **each degree is divided into 60 minutes ; each minute into 60 seconds.** Any angle is then measured by the number of degrees, minutes, seconds, and decimal parts of a second... | |
| 1864
...This divides each of them into two semicircles. All great circles are divided into 360 equal portions, **each of which is called a degree ( ° ). Each degree is divided into 60** equal portions called minutes ( ' ). Each minute is divided into 60 equal portions called seconds (*... | |
| John Bascombe Lock - 1882
...or decimal, method. I. The Sexagesimal Method. 46. 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 ; and each minute is again subdivided... | |
| Moffatt and Paige - 1883
...Arc. For the purposes of measurement, the circumference of a circle is supposed to be divided into 360 **parts, each of which is called a degree. Each degree is divided into** sixty minutes, and each minute into sixty seconds. These are generally expressed by signs, thus :—... | |
| John Bascombe Lock - Trigonometry - 1885 - 274 pages
...angles. 2. & 4 B. •6. I. The Sexagesimal Method. 46. 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 ; and each minute is again subdivided... | |
| Edward Albert Bowser - Trigonometry - 1892 - 172 pages
...Sexagesimal Method. — This is the method in general use. 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. Each minute is subdivided into 60... | |
| Edward Albert Bowser - Trigonometry - 1892 - 368 pages
...Sexagesimal Method. — This is the method in general use. 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. Each minute is subdivided into 60... | |
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