Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 27
iS- MECHANICAL DRAWING. is the centre of the required arc, and lines from 5 to 7- and from5 to J give 6 and 7, the points of contact of the arc and circles Aand B. Problem 25. … To draw, withiji a given equilateral triangle ABC,three equal circles, each tangent to twoothers and to one side of the triangle. Bisect the angles of the triangle andobtain i. Bisect the angle i AB andobtain 2, the centre of one circle. WithI as centre and radius 1-2 draw an arcto obtain centres j…
Mechanical drawing
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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-101-226.webp)
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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-100-223.webp)
