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
"Parallelograms which are on the same base and in the same parallels are equal to one another."
Strange & Unusual"Of trilateral figures, an equilateral triangle is that which has its three sides equal, an isosceles triangle that which has only two of its sides equal, and a scalene triangle that which has its thre…"
Shocking"A semicircle is the figure contained by the diameter and the circumference cut off by it. And the center of the semicircle is the same as that of the circle."
Strange & Unusual"To draw a straight line from any point to any point."
Shocking"If four magnitudes be proportional, the rectangle contained by the extremes is equal to the rectangle contained by the means."
Strange & Unusual