- On the Burning Mirror1
- Cutting off a Ratio
- On the Cylindrical Helix
- Quick Birthing
- Plane Loci
- On Verging Constructions
- Cutting an Area
- On Determinate Sections4
1. Parallel beams of light hitting a spherical mirror do not converge at one point.
2. All cuts as sections, at different angles, of the same cone…
3. A circle passing through the given points…
4. The points on a line must satisfy a given ratio.