Babbit, Arthur B · New York, H. Holt and company · leaf 37
short edge of the triangle is made to co-incide with the given line and is then pushed alongthe edge of the second triangle, thereby bringing theother short edge to the point through which the re-quired perpendicular is to be drawn. In Fig. 12,the hne M N is the given line and X Y is the… … USE OF TRIANGLES 27
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
