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 187
ed, but the following problem will enable us to arrive at an approximation, the error of which is only about1 1 OOjOOO- i66 PRACTICAL PLANE GEOMETRY Peoblem 192. To draw a line equal to the length of a semicircle. Let AC represent the radius. Draw the semich^cle ABD.Produce AC to D, and draw BC… … Fig. 302. A to H, and make AH equal to AD. Join HP, which will bethe line required. If we take AC to represent a length equal to the diameterof a circle, then HP will equal the circumference. We are also enabled to find the length of an arc by thismeans ; e.g. the arc to the chord formed by one…
Geometrical drawing
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