The Scientific American reference book; a compendium of useful information, containing the complete census of the United States by counties ... patent and copyright laws ... forms for patents, caveats, assignments, and licenses ... etc (1892)
New York, Munn · leaf 137
134 PRACTICAL GEOMETRY. … Problem 3.—To find the diameterof a circle that shall be any numberof times the area of a given circle:Let A B 0 D be the given circle;draw the two diameters A B and C Dat right angles to each other, and thecord A D will be the radius of thecircle o P, twice the area of the givencircle nearly; and…
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-118-325.webp)
