therefore the triangle BFC is also equal to the triangle CGB, and the remaining angles will be equal to the remaining angles respectively, namely those which the equal sides subtend;
erit tunc triangulus BZG triangulo GHB equalis et reliqui anguli reliquis angulis equales, quisque eorum suo relativo, cui subtenditur latus equale lateri quod primo subtensum fuit,
Title
Book I
