American text books of art education : Geometrical drawing (1873)
Smith, Walter, 1836-1886 · Boston : James R. Osgood & Co. · leaf 47
tinue the base B A tothe left, and with centre A, radius A B, describe a semicircle. Di-vide the semicircle into as many parts as the required polygon hassides, — in this case five. Draw a line from A to the second divisionof the semicircle A 2. Bisect A 2 and A B by Prob. 1, continuingthe… … Pror. 39.— Within a given circle to inscribe any regular polygon.General method. Find the centre of the circle by Prob. 21. Draw a diameter 1 2,and divide it by Prob. 18 into as many equal parts as there arc sidesto ihe polygon, — suppose five, for example. With centre 1, radius1 2, describe an…
Geometrical drawing
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