“A straight line is said to have been cut in extreme and mean ratio when, as the whole line is to the greater segment, so is the greater to the lesser.” — Euclid Copy Share Image
“Handwriting is a spiritual designing, even though it appears by means of a material instrument.” — Euclid Copy Share Image
In right-angled triangles the square on the side subtending the right angle is equal to the squares on the sides containing the right angle. — Euclid Copy Share Image
That, if a straight line falling on two straight lines makes the interior angles on the same side less than two right angles, the… — Euclid Copy Share Image
“A straight line is said to have been cut in extreme and mean ratio when, as the whole line is to the greater segment,… — Euclid Copy Share Image
