Iosephi Torelli veronensis Elementorum prospectivae libri II : opus posthumum (1788)
Torelli, Giuseppe, 1721-1781, Bertolini, Giovanni Baptista · Veronae : Ex officina Moroniana · leaf 34
a, & jungatur DO. Quoniam igitur in trian- gulis DPE, OFQ_angulus DPE aequalis eft angulo OFQ, & an- gulus DEP aequalis angulo OQF, a?qualifque DP ipfi OF, erit utique etiam DE aequalis ipfi OQ. Eft autem DE ipfi OQ.etiam parallela . Igitur DO parallela eft ipfi EQ_. Parallela eft autem… … cum communi planorum HR, IS fe&ione IR angulos faclt, fitin fublimi , cujufmodi ell IV quofcunque angulos faciens cumIR, sequales nempe , five insequales. Ducatur autem a pun&o Vplano IS perpendicularis recta VT; jungaturque IT. Erit utiqueangulus acutus TIV re&ae IV ad planum IS…
Perspective · Geometry
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