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 117
Fit?. 212. the centre, will bisect the parallelogram. Pkoblem 135. To hiscd a trai^ezimii hy a line drawn from one of its angles. Let ACDB be the trapezium.Draw the diagonal AD andbisect it in E (Prob. 1). JoinEC and EB. The trapezium isnow divided into two equalparts, ACEB being one partand CEBD… … 213. Pkoblem 136. To divide a given irregular polygon ABCDEFGHJK into anynumher of equal areas—for example, twelve—hy linesdraivn through one angle E. Join each angle to E. From E draw the line EL parallel toEG till it meets HG produced in L (Prob. 4). Erom L draw EQUIVALENT AREAS 97 the line LM…
Geometrical drawing
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