A ratio is a sort of relation in respect of size between two magnitudes of the same kind.
Father of geometry
Definition 3, Book V of 'Elements'
c. 300 BCE
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"When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular …"
Strange & Unusual"Magnitudes which can be made to coincide are equal."
Strange & Unusual"If a straight line be cut in extreme and mean ratio, the greater segment is also cut in extreme and mean ratio by the lesser segment."
Shocking"If four magnitudes be proportional, the rectangle contained by the extremes is equal to the rectangle contained by the means."
Strange & Unusual