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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 Minutes, each minute into 60 Seconds, and so on. "
The Theory and Practice of Surveying: Containing All the Instructions ... - Σελίδα 39
των Robert Gibson - 1814 - 508 σελίδες
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A Written Arithmetic, for Common and Higher Schools: To which is Adapted a ...

George Augustus Walton - 1864 - 348 σελίδες
...circumference, through the centre, to an opposite point, is called a Diameter. 188. The circumference of any circle is supposed to be divided into 360 equal parts, called Degrees, each degree into 60 Minutes, and each minute into 60 Seconds. TABLE. 60 seconds (") = 1 minute, marked...

A Written Arithmetic, for Common and Higher Schools: To which is Adapted a ...

George Augustus Walton - 1864 - 348 σελίδες
...circumference, through the centre, to an opposite foiat, is called a Diameter. 188. The circumference of any circle is supposed to be divided into 360 equal parts, called Degrees, each degree into 60 Minutes, and each minute into 60 Seconds. TABLE. marked '. u о 60 seconds (")...

Rudimentary treatise on mensuration and measuring

Thomas Baker (C.E.) - 1865
...CE be drawn, the space, bounded by these radii and the arc FE, will be the sector of a circle. 27. The circumference of every circle is supposed to be...equal parts, called degrees, and each degree into 60 minutes, each minute into 60 seconds, &e. Hence a semicircle contains 180 degrees, and a quadrant 90...

Elements of Plane and Solid Geometry: And of Plane and Spherical ...

Gerardus Beekman Docharty - 1867 - 283 σελίδες
...and the other two on the two sides, that which stands at the angular point is read in the middle. 57. 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...

Astronomy Without a Telescope: Being a Guide-book to the Visible Heavens ...

1869 - 104 σελίδες
...formed by straight lines, from stars or points, meeting at the eye of the observer. For this purpose the circle is supposed to be divided into 360 equal parts, called Degrees, and each of these degrees into 60 equal parts called Minutes, and each minute into 00 equal seconds. A quarter...

A complete treatise on practical land-surveying

Anthony Nesbit - 1870
...circumference, which is everywhere equidistant from a certain 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....

Elements of Geometry and Trigonometry: With Applications in Mensuration

Charles Davies - 1870 - 319 σελίδες
...the six parts is given. 21. For the purpose of trigonometrical calculation, the circumference of the circle is supposed to be divided into 360 equal parts, called degrees ; each degree is supposed to be divided into 60 equal parts, called minutes ; and each minute into...

Elements of Geometry, Conic Sections, and Plane Trigonometry

Elias Loomis - 1871 - 58 σελίδες
...Trigonometry treats of plane triangles; Spherical Trigonometry treats of spherical triangles. (19.) The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 minutes, and each minute into 60 seconds. Degrees, minutes, and seconds are designated...

New Elementary Arithmetic, Embracing Mental and Written Exercises, for ...

Henry Bartlett Maglathlin - 1872
...circle is any straight line drawn through the center, and terminated by the circumference, as AE. 105. The circumference of every circle is supposed to be divided into 360 equal parts, called Degrees. BISO* 270° What is a Circle ? The Circumference of a circle ? What is an Arc of a cirele ? A Diameter...

First book of mathematics

Hugo Reid - 1872 - 124 σελίδες
...two circumferences would exactly coincide. Division of the Circumference. 34. The circumference of a circle is supposed to be divided into 360 equal parts, called degrees, and marked °. Each degree is divided into 60 equal parts, called -minutes, and marked '. Each minute is...




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