Notes on practical mechanical drawing, written for the use of the students in general engineering drawing in the University of Illinois (1907)
Wilson, Victor Tyson, 1864- [from old catalog] · State College, Pa., The author · leaf 94
adius of the required circle. To construct a regular polygon of any number of sides, thelength of a side being given: Let AB, Fig. 13, be the lengthof a side, and let the potygon consist of x = 9 sides. WithAB as a radius, describe a semicircle and divide it into nine Irregular Curves and… … B - 6 prolonged at m, and join m with 7. Using m as a center and same radius, = BA, cut B - 5 prolonged in another vertex of the polygon, and so on. This solution is based upon the principle that if a 1 • • 1 180(x - 2),regular polygon has x sides, each interior angle = and second, that the…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
