 | Euclid - 1810 - 554 σελίδες
...C; the arch AC is called the measure of the angle ABC. II. The circumference of a circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, &c. And as... | |
 | Thomas Simpson - 1810 - 168 σελίδες
...supposed divided into some assigned number of equal parts. 2. The periphery of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds, or second... | |
 | Robert Gibson - 1811 - 580 σελίδες
...and is double the radius, as AB or DE. fig. 8. m *!6. The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts caled seconds, and these into... | |
 | Abner Alden - 1814 - 222 σελίδες
...earth ? A. By supposing the earth to be circumscribed by a .certain number of circles ; and each circle to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. Q. What... | |
 | Robert Gibson - 1814 - 558 σελίδες
...semicircles; and isdoublethe radius, as AB or DE. fig. 8. 16. The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and tiiese... | |
 | 1814 - 402 σελίδες
...it is a chord to both segments of the circle, as DFE and DGE. 12. A Circle is actually, or supposed to be divided into 360 equal parts, called Degrees, and each degree into 60 equal parts, called Minutes ; and these into seconds, &c. 13. An Angle is so many degrees,... | |
 | Robert Gibson - 1818 - 502 σελίδες
...to be divided into some assigned number of equal parts. 2. The periphery of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute, into 60 equal parts, called seconds ; &c. 3.... | |
 | Charles Hutton - 1818 - 646 σελίδες
...lines BA and 3D is called the angle BAC BAD or DAB. 67. The circumference of every circle is supposed to be divided into 360 equal parts, called Degrees : and each degree into 60 Minutes, each minute into 60 Seconds, and so on. Hence a semicircle contains 180 degrees, and... | |
 | 1820 - 352 σελίδες
...any circle. A Degree of a great circle of the earth contains 60 geographical, Or 69$ English miles. Each degree is divided into 60 equal parts, called minutes ; and each minute into 60seconds. Degrees are usually marked with a small cypher over them (°), minutes with one dash ('),... | |
 | Thomas Simpson - 1821 - 426 σελίδες
...supposed divided into some assigned number of equal parts. 2. The periphery of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes, and each minute into 60 equal parts, called seconds, or second... | |
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The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc. 
