The builder's dictionary, or, Gentleman and architect's companion : explaining not only the terms of art in all the several parts of architecture, but also containing the theory and practice of the various branches thereof ... : also necessary problems in arithmetic, geometry, mechanics, perspective, hydraulics, and other mathematical sciences : together with the quantities proportions, and prices of all kinds of materials used in building ... (1734)

Toms, W. H. (William Henry), ca. 1700-ca. 1750, Devoto, John, fl. 1719-1752 · London : Printed for A. Bettesworth and C. Hitch ..., and S. Austen ... · leaf 222

An illustration from The builder's dictionary, or, Gentleman and architect's companion : explaining not only the terms of art in all the several parts of architecture, but also containing the theory and practice of the various branches thereof ... : also necessary problems in arithmetic, geometry, mechanics, perspective, hydraulics, and other mathematical sciences : together with the quantities proportions, and prices of all kinds of materials used in building ..., 1734, leaf 222 — CLP and Quadrant 5 but I think itfsas^odawayto find the Areaof th°e whole Circle, and thenw take half that Area for theSemicircle, and a fourth partfor the Quadrant. QJJ jo find the Area of a Semi-circ, thhh the Rule. Multiply the fourth part ofthe Circumference of the wholeCircle, (that is, half… … 35-5» 17-75II-3 5325ii775 oD.^7o The Area of the Semicircle, By Scale and CompaJJes. Extend the Compares fromI to II,s, and that Extent willreach from 17.75 to 200.575,the Area. ^ If only the Diameter of tneSemicircle be given, you mayfay by the Rule of Three, asI is to 5927, fo is the Square ofthe…

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