Euclid — "A straight line is a line which lies evenly with the points on itself."
A straight line is a line which lies evenly with the points on itself.
A straight line is a line which lies evenly with the points on itself.
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"The square on the side subtending the right angle in right-angled triangles is equal to the squares on the sides containing the right angle."
"And the greater is a multiple of the less when it is measured by the less."
"The properties of figures are derived from their definitions and postulates."
"To construct a regular pentagon in a given circle."
"A plane angle is the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line."
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