Sire, there is no royal road to geometry.
Father of geometry
Reply to King Ptolemy I Soter who asked if there was a shorter way to learn geometry than through his 'Elements'.
c. 300 BCE
Found in 3 providers: gemini,grok,deepseek
Cross Reference
3 sources
"Things which coincide with one another are equal to one another."
Strange & Unusual"Magnitudes which can be made to coincide are equal."
Strange & Unusual"The properties of figures are derived from their definitions and postulates."
Strange & Unusual"Proof by contradiction is a powerful tool."
Shocking"Similar triangles are to one another in the duplicate ratio of their corresponding sides."
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