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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.
The Theory and Practice of Surveying: Containing All the Instructions ... - Σελίδα 45
των Robert Gibson - 1821 - 544 σελίδες
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## Elements of Geometry and Trigonometry from the Works of A.M. Legendre ...

Charles Davies, Adrien Marie Legendre - 1885 - 512 σελίδες
...angle. For convenience, the quadrant is divided into 90 equal parts, each of which is called a degree ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds. Degrees, minutes, and seconds, are denoted by the symbols °, ', "....

## Caldwell's Practical Arithmetic ...

M. P. Caldwell - 1883 - 191 σελίδες
...is used in estimating latitude and longimde, and also in measuring the motions of heavenly bodies. The circumference of every circle is supposed to be divided into 360 degrees. TIME. 60 Seconds (sec.) make 1 Minute, marked m. 60 Minutes " 1 Hour, " hr. 24 Hours " 1 Day,...

## The American Practical Navigator: Being an Epitome of Navigation and ...

Nathaniel Bowditch - 1888 - 647 σελίδες
...the figure CAG. Nate. All circles, whether great or small, are supposed to have their circumference divided into 360 equal parts, called degrees ; and...equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and so on into thirds, fourths, Jtc. ; and an arc is said to be of...

## Robinson's Progressive Practical Arithmetic: Containing the Theory of ...

Horatio Nelson Robinson - 1888
...sjiits containing 9 yd. 2 qr. each ; how many suits did he make ? Ans. 1 7. LONGITUDE AND TIME. 224. Every circle is supposed to be divided into 360 equal parts, called degrees. Since the sun appears to pass from east to west round the earth, or through 360°, once in every 24...

## Mechanics' and Engineers' Pocketbook of Tables: Rules, and Formulas ...

Charles Haynes Haswell - 1890 - 956 σελίδες
...right line that touches a circle without cutting it. Cotangent is tangent of complement of arc. • ii Circumference of every circle is supposed to be divided into 360 equal parts, termed Degrees ; each degree into 60 Minutes, and each minute into 60 Seconds, and so on. Complement...

## Practical Plane and Solid Geometry, Including Graphic Arithmetic

Isaac Hammond Morris - 1890 - 260 σελίδες
...PROBLEM 24. — To construct an angle containing a given number of degrees. The circumference of a circle is supposed to be divided into 360 equal parts, called degrees. The radius of a circle may be set off exactly six times round the circumference ; hence, if an arc...

## A Rudimentary Treatise on Land and Engineering Surveying: For Students and ...

Thomas Baker - 1891 - 231 σελίδες
...the arc FE, will be the sector of a circle. 27. The circumference of every circle is supposed to bo divided into 360 equal parts, called degrees, and each degree into 60 minutes, each minute into 60 seconds, &c. Hence a semicircle contains 180 degrees, and a quadrant 90...

## Robinson's New Practical Arithmetic for Common Schools and Academies

Horatio Nelson Robinson - 1892 - 416 σελίδες
...times are 4 bu. 3 pk. 2 qt. contained in 336 bu. 3 pk. 4 qt. ? Ans. 70 times. LONGITUDE AND TIME. 224. Every circle is supposed to be divided into 360 equal parts, called degrees. Since the sun appears to pass from east to west round the earth, or through 360°, once in every 24...

## Robinson's New Practical Arithmetic for Common Schools and Academies

Horatio Nelson Robinson - 1892 - 416 σελίδες
...the size of each farm ? Ans. 106 A. 106 P. 20 sq. yd. 1 sq. ft. 72 sq. in. LONGITUDE AND TIME. 224:. Every circle is supposed to be, divided into 360 equal parts, called degrees. Since the sun appears to pass from east to west round the earth, or through 360°, once in every 24...

## Mensuration

William Shaffer Hall - 1893 - 62 σελίδες
...angle is taken as the unit. A convenient unit is a right angle. The right angle is divided into 90 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Angles at the centre of a circle have the same ratio as the arcs which...