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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.
A Treatise of Plane and Spherical Trigonometry: In Theory and Practice ... - Page ix
by Francis Nichols - 1811 - 128 pages

The Normal Union Arithmetic: Graded Course, Volume 2

Edward Brooks - Arithmetic - 1877 - 250 pages
...circumference is called a quadrant. , 290. For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees ; each...into 60 equal parts, called minutes; each minute into 60 equal parts, called seconds. 291. Any angle having its vertex at the centre, is measured by the...

The New Normal Written Arithmetic: Designed for Common Schools, Normal ...

Edward Brooks - Arithmetic - 1877 - 444 pages
...circumference is called a quadrant. 290. For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees ; each...into 60 equal parts, called minutes; each minute into GO equal parts, called seconds. 291. Any angle having its vertex at the centre, is measured by the...

The New Normal Written Arithmetic: Designed for Common Schools, Normal ...

Edward Brooks - Arithmetic - 1877 - 438 pages
...circumference is called a quadrant. * 290. For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees; each...into 60 equal parts, called minutes; each minute into 60 equal parts, called seconds. 2O1. Any angle having its vertex at the centre, is measured by the...

The Elementary Arithmetic: Oral and Written

Albert Newton Raub - Arithmetic - 1877 - 176 pages
...the centre and limited by the circumference, as AD, is called a Diameter. 129. Every circumference is divided into 360 equal parts, called degrees; each degree into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. TABLE. 60 seconds ( " ) =1 minute, ( ' ). 60 minutes...

The Yachtsman's Handybook for Sea Use: And Adapted for the Board of Trade ...

William Henry Rosser - 1877 - 158 pages
...any portion (long or short) of the circumference, as AF, or B r. The circumference of every circle is divided into 360 equal parts, called DEGREES ; each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds; which are respectively marked ° ' ". (See p. 1,...

Scientific and practical geometry for self-instruction

Rolla Rouse - 1879 - 402 pages
...circle (B 27, abdc). 20. For comparing the arc of an angle with a circumference, the latter is taken 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 right angle containing 90 degrees, and a semicircle...

The Scientific and Literary Treasury

Samuel Maunder - Encyclopedias and dictionaries - 1880 - 904 pages
...having a quarter of the circumference for its arc. 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 80 seconds: hence я semicircle contains 180 degrees, andaquadrtnt 90...

Colton's Common School Geography: Illustrated by Numerous Engravings and ...

George Woolworth Colton, Joseph Hutchins Colton - Atlases - 1880 - 152 pages
...unequal parts. 4. For the purpose of measurement, every circle is conceived to be divided into 3(30 equal parts called Degrees ; each degree, into 60 equal parts called minutes; and each minute, into GO equal parts called Seconds. Degrees are marked °, minutes ', seconds ''....