American text books of art education : Geometrical drawing (1873)
Smith, Walter, 1836-1886 · Boston : James R. Osgood & Co. · leaf 56
Prob. 46.— To inscribe an octagon within a given circle. Draw a circle. Then draw any diameter, as A B. Bisect it bya perpendicular C D, thus dividing the circle into four equal parts.Bisect the two upper right angles which are at the centre of A B,and continue the bisecting lines until they cut… … Prob. 47.— Within any sector of a circle, to inscribe a circle.Draw any sector, as A B C. Bisect the angle at C and continuethe bisecting line until it cuts the arc A B at D. At D erect aperpendicular to D C. Produce C B to cut this perpendicular in E. Bisect angle DEC, producing the bisecting line…
Geometrical drawing
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