ique to the plane of projection. Referring to Fig. 38, C, let it berequired to construct the projection of a square so placed that the ratio of horizontaldistances between its three nearer comers is f. That is PR = 3PQ. Draw QR any desired length and take point P so PR = 3PQ. Erect verticalsat Q… … 88 232. If the true length of side of the square represented is desired, it can be found by noting from Fig.38, A, that it is the hypothenuse in a right triangle whose legs are equal to PQ and PR. 233. In Fig. 39, the projection CDEF of a square has been drawn by the method of Section 231. AC =2BC…
Mechanical drawing · Lettering
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