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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, &c. "
A Treatise of Practical Surveying: Which is Demonstrated from Its First ... - Σελίδα 25
των Robert Gibson - 1806 - 452 σελίδες
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A System of Geometry and Trigonometry: Together with a Treatise on Surveying ...

Abel Flint - 1818 - 184 σελίδες
...Centre ; and it divides the Circle into two equal parts, called Semicircles ; as AB or DE. Fig 5. 14. The Circumference of every Circle is supposed to be...equal parts, called Seconds ; and these into Thirds, &c. Note. Since all Circles are divided into the same number of Degrees, a Degree is riot to be accounted...

A Treatise on Practical Surveying: Which is Demonstrated from Its First ...

Robert Gibson - 1818 - 502 σελίδες
...about circles, be supposed to be divided into some assigned number of equal parts. 2. The periphery of every circle is supposed to be divided into 360...and each minute, into 60 equal parts, called seconds ; &c. 3. Any part of the periphery, is calledlan arch ; and is the measure of the angle at the centre,...

A Course of Mathematics: In Two Volumes. For the Use of Academies ..., Τόμος 1

Charles Hutton - 1818 - 646 σελίδες
...the middle. Thus the angle contained by the lines BA and 3D is called the angle BAC BAD or DAB. 67. The circumference of every circle is supposed to be...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 a quadrant...

Geometrical Problems Deducible from the First Six Books of Euclid, Arranged ...

Miles Bland - 1819 - 444 σελίδες
...unanimously agreed to divide the circumference of the circle into 36o equal parts called Degrees ; each degree into 60 equal parts called Minutes ; 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...

Geometrical Problems Deducible from the First Six Books of Euclid, Arranged ...

Miles Bland - 1819 - 442 σελίδες
...unanimously agreed to divide the circumference of the circle into 36o equal parts called Degrees ; each degree into 60 equal parts called Minutes; 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...

British Encyclopedia: Or, Dictionary of Arts and Sciences ..., Τόμος 3

William Nicholson - 1819 - 414 σελίδες
...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...

Hawney's Complete Measurer: Or, The Whole Art of Measuring: Being a Plain ...

William Hawney - 1820 - 336 σελίδες
...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 divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes : and each minute into 60 equal parts, called seconds....

A Treatise of Algebra: Wherein the Principles are Demonstrated ... To which ...

Thomas Simpson - 1821 - 426 σελίδες
...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...and each minute into 60 equal parts, called seconds, or second minutes, <Jc. Any part of the periphery is called an arch, and is measured by the number...

The Theory and Practice of Surveying: Containing All the Instructions ...

Robert Gibson - 1821 - 594 σελίδες
...circumference into two equal parts, called semicircles; and is double theradius,as AB or DE. fig. 8. 16. The circumference of every circle is supposed to be...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...

The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid, Robert Simson - 1821 - 514 σελίδες
...arch AC is called the measure of the angle ABC. II. The circumference of a circle is supposed to lie divided into 360 equal parts called degrees; and each...and each minute into 60 equal parts called seconds, &c. And as many degrees, minutes, seconds, &c. as are contained in any arch, of so many degrees, minutes,...




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