rawing the projection of asquare which is oblique to the plane of projection. Referring to Fig. 28, C. let it berequired to construct the projection of a square so placed that the ratio of horizontaldistances between its three nearer corners is |-. That is PR = 3PQ. Draw QR any desired length and… … OR the same fractional part of MQ that PQ is of PR, in this caseMN parallel to it. Draw NO parallel to MP. Fig. 190. If the true length of side of the square represented is desired, it can be foundby noting from Fig. 28, A, that it is the hypothenuse in a right triangle whose legs are equal to PQ…
Mechanical drawing · Lettering
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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-112-294.webp)
