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 127
of its sides. Bisect one side, CB for example, in the point G (Prob. 1). io6 PRACTICAL PLANE GEOMETRY AVith G as centre, and GB as radius, draw the semicircle CFHB. -^ F Trisect the line CB in D and E (Prob. 10). Findthe mean proportional OF be-tween CB and CD (Prob. 116).Make CK equal to CF.… … Pkoblem 148. To construct a triangle one-fifth the area of a sirailartriangle ABC. Produce the line AB to D, making DA equal to one-AB (Prob. 10). Bisect DB inF (Prob. 1), and with F as centreand FD as radius, draw the semi-circle DEB. At A erect AEperpendicular to AB (Prob. 7).AE is the mean…
Geometrical drawing
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