That all right angles are equal to one another.
Father of geometry
Found in 1 providers: grok
Cross Reference
1 source
"To draw a straight line at right angles to a given straight line from a given point on it."
Strange & Unusual"The prime numbers are more than any assigned multitude of prime numbers."
Shocking"To construct a regular pentagon in a given circle."
Strange & Unusual"What has been affirmed without proof can also be denied without proof."
Strange & Unusual"What advantage shall I get by learning these things?"
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