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 107
Fis. 192. Problem 120.TJiis iirohlem ilhistrates an important principle in proportion.Take a triangle ABC, the sides of which shall bear a certain … Fig. 193. ratio. For exam-pie, let AB : BC as 2 :1. Produce AB to D, andbisect the angles ABC and DBC by lines meeting AC pro-duced in H and E. Bisect the line HE in K (Prob. 1). WithK as centre, and KE as radius, draw the circle EBH. Now, ifwe take any point M in this circle, and join MA and MC,…
Geometrical drawing
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