A textbook on mechanical and electrical engineering (1898)
International Correspondence Schools · Scranton : International Textbook Co., [1898-99] · leaf 265
lying tothe right of O, and coinciding with thehorizontal diameter, as O B. The point B on the arc is the startingpoint in measuring an angle; the angleis supposed to increase by moving around the circ-umferencein the direction indicated by the arrow until the number ofdegrees, minutes, and seconds… … GEOMETRY AND TRIGONOMETRY. 255 In practice, angles are most conveniently laid off by usinga protractor (see Geometrical Draiviiig), which is usuallygraduated to degrees and half degrees, minutes beingestimated by the eye. 80. Since a quadrant is a fourth part of a circle, thenumber of degrees in a…
Electrical engineering · Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
