Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 104
88. Dodecahedron, r = 1-11350 s.R= 1-36428 s.a = 20-5457 s>.c = 7-66312 s«. … 89. Icosahedron, r = 0-7558 s. £= 0-9510 s.a = 8-66025 s3.c = 2-18169 sa. r = Kadius of an inscribed Sphere.R = Radius of circumscribed Sphere.a = Area of the Polyhedrons.c = Cubic contents of the Polyhedrons.S = Side or edge of the Polyhedrons. 06 Planemetry. f —Wmm 90. Square. a = g* = U\ a =…
Mechanical engineering · Engineering
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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-246-435.webp)