Chapter IX: Inversion

Circular Inversion, Conformal Angle Preservation, Peaucellier’s Cell, Ptolemy’s Extension, Feuerbach’s Theorem by Inversion

Digital Scriptorium Architectural Blueprint

• Archival Span: Folios 0249–0262 · Printed Pages 230–243 · Articles §§ 518–546

• 300 DPI Raster Scans: 14 standardized folios ready in resources/college_geometry/09_inversion/

• Companion Track: Switch to the Commentary tab above for mathematical synthesis, triangle-center mappings, and GEOMETOR connections.

Section & Article Conspectus

Section	Title	Folios	Pages	Articles
Main	Theory and Applications of Circular Inversion	0249–0262	230–243	§§ 518–546

Folio Scan Allocation

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0249	230	—	§§ 518–519	300 DPI gray
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