| Anthony Nesbit - Measurement - 1859 - 482 pages
...angles which principally depend on the properties of the circle, and circular arcs. Every circle is **divided into 360 equal parts called degrees, each degree into 60 equal parts called minutes,** each minute into 60 equal parts called seconds, and so on by a sexigesimal division into thirds, fourths,... | |
| 1867 - 566 pages
...following pages. 8. Degrees &c. — AU circles, whether great or small, are supposed to be divided into 860 **equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and** and each minute into 60 equal parts, called seconds, &c.* 9. An Angle is the inclination of two lines... | |
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