 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.  An Elementary Geometry and Trigonometry - Page 11by William Frothingham Bradbury - 1873 - 238 pagesFull view - About this book
 | Charles Austin Hobbs - Arithmetic - 1889 - 366 pages
...to the circumference is called a radius, and it is equal to one half a diameter. The circumference is divided into 360 equal parts, called degrees, each degree into 60 minutes, and each minute into 60 seconds. The opening between two straight lines which meet at a point... | |
 | William Findlay Shunk - Railroad engineering - 1890 - 360 pages
...includes one-quarter of the circle, and is the measure of a right angle. Each degree is further divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds. Degrees, minutes, and seconds are denoted by the symbols °, ', ": thus the expression 7° 22' 33"... | |
 | John H. Macke - Carpet laying - 1891 - 244 pages
...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 the circumference by 3.1416. Example.... | |
 | William Benjamin Smith - Geometry, Modern - 1892 - 160 pages
...straight angle? In a right angle ? HISTORICAL NOTE. — For purposes of computation the round angle is divided into 360 equal parts called degrees, each degree into 60 equal minutes (partes minutce primae), each minute into 60 equal seconds (partes minutae secunJiz), denoted... | |
 | George Albert Wentworth - Algebra - 1892 - 312 pages
...minutes = 1 degree (°). 90 degrees — 1 right angle. 360 degrees = 1 revolution. The circumference of a circle is divided into 360 equal parts, called degrees ; each degree into 60 minutes ; each minute into 60 seconds. The larger the circle, the greater the length of 1 degree. 1... | |
 | William Benjamin Smith - Geometry, Modern - 1892 - 314 pages
...straight angle? In a right angle ? HISTORICAL NOTE. — For purposes of computation the round angle is divided into 360 equal parts called degrees, each degree into 60 equal minutes (partes minutes primae), each minute into 60 equal seconds (partes minutse secundci), denoted... | |
 | William Shaffer Hall - Measurement - 1893 - 88 pages
...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 are subtended by them (Ww. Geom.,... | |
 | William Benjamin Smith - Geometry, Modern - 1893 - 330 pages
...straight angle? In a right angle ? HISTORICAL NOTE. — For purposes of computation the round angle is divided into 360 equal parts called degrees, each degree into 60 equal minutes (partes minutte primse), each minute into 60 equal seconds (partes minutse secundtz), denoted... | |
 | Albert Newton Raub - Arithmetic - 1894 - 200 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...and each minute into 60 equal parts, called seconds. TABLE. 60 seconds (") =1 minute, (' ). 60 minutes = 1 degree, ( ° ). 30 degrees = 1 sign, s. 12 signs... | |
 | Nathan Fellowes Dupuis - Geometry - 1894 - 313 pages
...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' 42f". This is denoted as 42°. Theorem... | |
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