Euclid's Muse

Diagram 6.33 of Euclid’s Elements.

Proposition 5.25 from Euclid’s Elements.

First diagram from Euclid’s Elements

Given two unequal straight lines, to cut off from the greater a straight line equal to the less.

To place at a given point (as an extremity) a straight line equal to a given straight line.

On a given finite straight line to construct an equilateral triangle.