A surface is that which has length and breadth only.
Father of geometry
Definition 5, Book I of 'Elements'
c. 300 BCE
Found in 3 providers: grok,deepseek,gemini
Cross Reference
3 sources
"Let it be granted that a circle may be described with any center and any radius."
Strange & Unusual"Similar triangles are to one another in the duplicate ratio of their corresponding sides."
Strange & Unusual"Parallel straight lines are straight lines which, being in the same plane and being produced indefinitely in both directions, do not meet one another in either direction."
Strange & Unusual"If equals be subtracted from equals, the remainders are equal."
Strange & Unusual"In any right-angled triangle, the square on the side subtending the right angle is equal to the squares on the sides containing the right angle."
Strange & Unusual