Keywords: EuclidesB1T9.png Euclides drawing Drawing of proposition 9 in Euclid book 1 instructions draw it on http //www liberliber it/biblioteca/e/euclides/index htm Originated in 1546 and redrawn in 2007 Originated by Nicolò Tartaglia and redrawn by bebo1991 PD-old Ruler-and-compass construction Elements of Euclid |