| Miles Bland - 1819 - 377 páginas
...Till lately, Geometers almost unanimously agreed to divide the circumference of the circle into 36o **equal parts called Degrees ; each degree into 60 equal...and each minute into 60 equal parts called Seconds,** &c. This method appeared to the Greek Geometers to afford some facilities for calculations, in consequence... | |
| Miles Bland - 1819 - 377 páginas
...Till lately, Geometers almost unanimously agreed to divide the circumference of the circle into 36o **equal parts called Degrees ; each degree into 60 equal...and each minute into 60 equal parts called Seconds,** &c. This method appeared to the Greek Geometers to afford some facilities for calculations, in consequence... | |
| William Nicholson - 1819
...otherwise called a periphery ; the boundary of a right lined figure being expressed by the term perimeter. **The circumference of every circle is supposed to be divided into 360** degrees. The angle at the circumference of a circle is double that at the centre. For the ratio of... | |
| William Hawney - 1820 - 312 páginas
...thus the arch I)E is the measure of the angle DBE aud the arch GH is the measure of the angle ABC. 1*. **The circumference of every circle is supposed to be...and each minute into 60 equal parts, called seconds.** Angles are measured by the number of degrees cut oft'from the circle, by the lines which form the angles.... | |
| Bewick Bridge - 1821 - 227 páginas
...For the purpose of exhibiting arithmetically the magnitude of angles, the whole circumference of the **circle is supposed to be divided into 360 equal parts,...degrees; each degree into 60 equal parts, called minutes;** each minute into 60 equal parts, called seconds; &c. &c. And since arcs are the measures of angles,... | |
| Thomas Simpson - 1821 - 408 páginas
...and about the circle, be 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... | |
| Robert Gibson - 1821 - 544 páginas
...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** 00 equal parts called seconds, and- these into thirds, fourths, &c. these parts being greater or less... | |
| Anthony Nesbit, W. Little - 1822
...part of a circle, as ADC. " *fi. A sector is any part of a circle bounded by an arc sad two radii. 47. **The circumference of every circle is supposed to be...and each minute into 60 equal parts, called seconds,** &c. 48. The arc of a quadrant contains 90 degrees, which is the measure of a right angle. 49. An ellipse... | |
| Joseph Emerson Worcester - 1822 - 322 páginas
...ecli^tc, and the two colurvs. equal parts. These are four, the two tropics, and (he two polar circles. **The circumference of every circle is supposed to be...equal parts, called minutes ; and each minute into** 00 equal parts, called seconds. They are marked thus, 23° 28' 16" ; i- e. 33 degrees, 28 minute!",... | |
| Euclid, Rev. John Allen - 1822 - 494 páginas
...called acute.* * Mathematicians have supposed the whole circumference of a circle to be divided in **360 equal parts, called degrees, each degree into...and each minute into 60 equal parts, called seconds,** Stc. and a circle being described from the vertex of an angle, as a centre, an angle is said to be... | |
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