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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.
Elements of Plane and Spherical Trigonometry: With Their Applications to ... - Página 4
por Olinthus Gregory - 1816 - 244 páginas
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## Euclid's Elements of plane geometry [book 1-6] explicitly enunciated, by J ...

Euclides - 1860
...a circle is accordingly supposed to be divided into 360 equal parts, called degrees ; each of these into 60 equal parts, called minutes ; each of these into 60 equal parts, called seconds ; and so on. If, therefore, a circle be described from the angular point as a centre, the number of degrees, minutes,...
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## A Manual of the Protracting Trigonometer: With Its Application to ...

Josiah Lyman - 1862 - 77 páginas
...fourth part of a circle; as AFB, Fig. 1. 8. 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, &c. 9. The Measure of an angle is the arc intercepted...
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## Elements of Geometry and Trigonometry: With Practical Applications

Benjamin Greenleaf - 1862 - 490 páginas
...fixed upon as the unit of angular measure. For this purpose a right angle is generally divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds ; then an angle is expressed by the number of degrees, minutes,...
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## Elements of Plane Trigonometry: And Their Application to the Measurement of ...

1864
...point within, called the centre ; as ABD E. 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 ( "). 34. The RADIUS of a circle is a line...
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## Elements of Geometry and Trigonometry

C. Davies - 1867
...The circumference of a circle is used for the measurement of angles- For this purpose it is divided into 360 equal parts called degrees, each degree into 60 equal parts called ninutes, and each minute into 60 equal parts called secondsThe degrees, minutes, and seconds are marked...
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## Smith's Illustrated Astronomy: Designed for the Use of the Public Or Common ...

Asa Smith - 1868 - 79 páginas
...— The boundary of a circle. The circumference of every circle ¡в supposed to be divided into and equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. Circumpolar Start.— Those stars which revolve...
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## Elements of Geometry and Trigonometry: With Practical Applications

Benjamin Greenleaf - 1869 - 382 páginas
...fixed upon as the unit of angular measure. For this purpose a right angle is generally divided into 90 equal parts called degrees, each degree into 60 equal parts called minutes, each minute into 60 equal parts called seconds ; then an angle is expressed by the number of degrees, minutes,...
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## A complete treatise on practical land-surveying

William Burness - 1870
...point within it, called the centre. 39. 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. 40. The diameter of a circle is a right line...
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## A Treatise on Plane and Spherical Trigonometry

Enoch Lewis - 1872
...supplement. Thus BHD is the supplement of AB. 10. The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; eafth minute into 60 equal parts, called seconds, &c. Degrees, minutes and seconds are designated thus,...
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## An Elementary Geometry and Trigonometry

William Frothingham Bradbury - 1872 - 238 páginas
...of methods of computing plane angles and triangles. 17. The circumference of every circle is dividad into 360 equal parts, called degrees ( ° ), each degree into 60 equal parts, called minutes ( ' ), and each minute into 60 equal parts, called seconds ( " ). 18. As angles at the centre valy...
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