What has been affirmed without proof can also be denied without proof.
Father of geometry
Widely attributed, but a direct primary source from Euclid's time is elusive.
c. 300 BCE (attributed much later)
Found in 2 providers: gemini,deepseek
Cross Reference
2 sources
"Let it be granted that a circle may be described with any center and any radius."
Strange & Unusual"Give him threepence, since he must make a gain out of what he learns."
Shocking"The postulates are not self-evident, but they are necessary for the development of geometry."
Strange & Unusual"That which is without parts has no magnitude."
Shocking"In any triangle, if one of the sides be produced, the exterior angle is equal to the two interior and opposite angles, and the three interior angles of the triangle are equal to two right angles."
Strange & Unusual