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In order to obtain accurate measurements each degree is divided into 60 equal parts called minutes and each minute is divided into 60 equal parts called seconds.
Arithmetic by Grades for Inductive Teaching, Drilling and Testing..: Book no ... - Σελίδα 81
των John Tilden Prince - 1894
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## Elements of geometry, with ... trigonometry

André Darré - 1872
...equal parts into which the circumference of every circle is supposed to be divided are called degrees ; each degree is divided into 60 equal parts called minutes ; and each minute into 60 equal parts called seconds. Symbols are used to express degrees, minutes, and seconds. Thus...

## The naval architect's and shipbuilder's pocket book of formulæ [&c.].

Clement Mackrow - 1879
...right angle is supposed to be divided into 90 equal parts, each of which parts is termed a degree ; each degree is divided into 60 equal parts, called...minute is divided into 60 equal parts, called seconds. To express the measure of an angle in degrees and decimal parti of a degree. Ex. : To bring 24°, 16',...

## Text-book of Popular Astronomy ...

William Guy Peck - 1883 - 323 σελίδες
...place is called a sidereal day. The sidereal day is divided into 24 equal parts called hours, each hour is divided into 60 equal parts called minutes, and...minute is divided into 60 equal parts called seconds. Time reckoned iu terms of these units is called sidereal time. The sidereal day, which is assumed to...

## Subterraneous Surveying: With and Without the Magnetic Needle

Thomas Fenwick, Thomas Baker - 1888 - 165 σελίδες
...peri/phery divided into, or to con\ tain, 360 equal parts, called i degrees, — and those degrees -JB are divided into 60 equal parts, / called minutes, — and each minute is divided again into 60 equal parts, called seconds, &c. 3. Every circle AD, contains four right angles, at angles...

## Elementary Synthetic Geometry of the Point, Line and Circle in the Plane

Nathan Fellowes Dupuis - 1889 - 294 σελίδες
...right angle. For practical purposes the right angle is divided into 90 equal parts called degrees ; each degree is divided into 60 equal parts called minutes ; and each minute into 60 equal parts called seconds. 20 seconds and six-sevenths of a second, follows : — 51° 25'...

## The Carpet-dealer's Guide: A Manual of Practical Information on the Art of ...

John H. Macke - 1891 - 228 σελίδες
...practical purposes, the circumference of a circle is divided into 360 equal parts, called degrees; each degree is divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. To find the diameter when the circumference is given. RULE. Divide...

## Plane Trigonometry

S. L. Loney - 1893
...the Sexagesimal system of measurement a right angle is divided into 90 equal parts called Degrees. Each degree is divided into 60 equal parts called Minutes, and each minute into 60 equal parts called Seconds. The symbols 1°, Г, and 1" are used to denote a degree, a minute,...

## ELEMENTARY SYNTHETIC GEOMETRY OF THE POINT, LINE AND CIRCLE IN THE PLANE

...right angle. For practical purposes the right angle is divided into 90 equal parts called degrees ; each degree is divided into 60 equal parts called minutes ; and each minute into 60 equal parts called seconds. 20 seconds and six-sevenths of a second, follows :— 51° 25'...

## Grammar School Arithmetic for Inductive Teaching, Drilling and Testing ...

John Tilden Prince - 1895 - 282 σελίδες
...o'clock? at 2 o'clock? at 11 o'clock? 4. Find on the globe arcs of different degrees. Are the degrees on the parallels of the same length or of different length...many minutes in 4° ? How many seconds ? 3. Change 10° 40' to minutes. 4. Change 4° 20' to seconds. 5. Change to minutes : 8° 15' ; 6° 45' ; ¿ of...

## A Treatise on Surveying: Comprising the Theory and the Practice, Μέρος 1

...same radius. Every circumference is regarded as being divided into 360 equal parts, culled degrees. Each degree is divided into 60 equal parts, called minutes, and each minute into 60 seconds. These divisions are indicated by the murks ° ' ". Thus 28 degrees, 17 minutes, and...