wikipedia.org/wiki/User:Baszoetekouw) gave me permission to modify th English Hexagonal structure of the crystal lattice Persian ساختار شش ضلعی شبکه کریستالی
not checked. Diagram for the proof of Pappus's Hexagon Theorem. Converted to SVG from Image:PappusHexagonalTheorem.PNG; conversion is public domain by uploader