An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888)
Gwilt, Joseph, 1784-1863, Papworth, Wyatt Angelicus Van Sandau, 1822-1894 · London Longmans, Green · leaf 303
282 THEORY OF ARCIITTECTUUE. Be II … Because AC is to DC as FM is to BT., the product or rectangle of the extremes AC,BL is (Irop. 67.) equal to the product or rectangle of the means DG, FM. The halves(Corol. to Irop. 27.) of these tvvo rectangles, P namely, triangles AI5C, DFG, are thereforee(jual. 955. Prop. LXXVII. Two secants…
Architecture · Architects
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