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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