Manual of Euclid: Books 1-6, Livros 4-6

angle BAC antece arc BC bisected centre circumscribed circle construct the triangle Corollary diameter draw drawn equal angles equiangular equilateral equimultiples exscribed circles find the locus fore four magnitudes fourth given circle given in position given line given point given ratio given triangle greater ratio harmonically homologous homologous sides inscribed intersection joining less multiple parallel parallelogram perpendicular polygon Proof Proof.-Because Prop Q. E. D. PROPOSITION quadrilateral radical axis radius rectangle rectilinear figure right angles right line scribed segments similar square Statement.-Let straight line tangents tiple triangle ABC vertex vertical angle Wherefore αἱ ἀνάλογον γωνίας δὲ δοθέντα ἐν ἔσται ἴσα ἴσας ἴσον καὶ κύκλον λόγον μεγέθη Ορος ὅταν περὶ πρὸς τὸ Πρότασις τὰ τὰς τε καὶ τὴν τῆς τοῖς τὸν αὐτὸν τοῦ τῷ τῶν ὡς