Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 114
Fig. 206. Problem 129. To clrcao a triangle equivalent to any rectilinear figure, forexample an irregular hexagon ACDEFB. Join DA. From C draw CH parallel to DA to meet ABproduced in H (Prob. 4). Join DH. We now have an ir-regular pentagon HDEFBequivalent to the givenhexagon. Join EB. From F drawFK… … Fig. 207. Join DK. From E draw the line EL parallel to DK tillit meets AB produced in L. Join DL. We now have the required triangle HDL equivalent to thegiven hexagon. Peoblem 130. To construct cc triangle equal in area to a given irregular polygonACDEFGB, the polygon having a re-entering angle…
Geometrical drawing
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