“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
That, if a straight line falling on two straight lines makes the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which the angles are less… — 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
