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
"Further, of trilateral figures, a right-angled triangle is that which has a right angle, an obtuse-angled triangle that which has an obtuse angle, and an acute-angled triangle that which has its three…"
Strange & Unusual"And when the lines containing the angle are straight, the angle is called rectilineal."
Shocking"To construct a square on a given straight line."
Strange & Unusual"Things which are equal to the same thing are also equal to one another."
Strange & Unusual"To bisect a given rectilinear angle."
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