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Euclid
(c. 325 B.C. - c. 270 B.C.)
Greek mathematician who is famous for his text-books on geometry. Though little is known of his private life, his work in geometry has been in use for almost two thousand years.
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Science Quotes by Euclid (3 quotes)
In right-angled triangles the square on the side subtending the right angle is equal to the squares on the sides containing the right angle.
— Euclid
The Thirteen Books of Euclid's Elements Translated from the Text of Heiberg, introduction and commentary by Sir T. L. Heath (1926), Vol. 1, 349.
That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
— Euclid
The Thirteen Books of Euclid's Elements Translated from the Text of Heiberg, introduction and commentary by Sir T. L. Heath (1926), Vol. 1, 155.
There is no royal road to geometry.
— Euclid
In James Wood, Dictionary of Quotations from Ancient and Modern, English and Foreign Sources (1893), 474:17.
At the heart of science is an essential balance between two seemingly contradictory attitudes--an openness to new ideas, no matter how bizarre or counterintuitive they may be, and the most ruthless skeptical scrutiny of all ideas, old and new. This is how deep truths are winnowed from deep nonsense. -- Carl Sagan
