„In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.“

—  Arquímedes, libro On the Equilibrium of Planes

Book 1, Proposition 13.
On the Equilibrium of Planes

Arquímedes Foto
Arquímedes6
sabio griego del siglo III a.C. -287 - -212 a.C.

Citas similares

Archimedes Foto
Archimedes Foto
Archimedes Foto
Archimedes Foto

„The centre of gravity of any cylinder is the point of bisection of the axis.“

—  Archimedes, libro The Method of Mechanical Theorems

Proposition presumed from previous work.
The Method of Mechanical Theorems

Archimedes Foto
Aristarchus of Samos Foto
Archimedes Foto

„The centre of gravity of any cone is [the point which divides its axis so that] the portion [adjacent to the vertex is] triple“

—  Archimedes, libro The Method of Mechanical Theorems

of the portion adjacent to the base
Proposition presumed from previous work.
The Method of Mechanical Theorems

Archimedes Foto

„The centre of gravity of a parallelogram is the point of intersection of its diagonals.“

—  Archimedes, libro On the Equilibrium of Planes

Book 1, Proposition 10.
On the Equilibrium of Planes

Thomas Little Heath Foto
Henry Ford Foto
Johannes Kepler Foto
Mark Twain Foto

„A circle is a round straight line with a hole in the middle.“

—  Mark Twain American author and humorist 1835 - 1910

Quoting a schoolchild in "English as She Is Taught"

Arthur Schopenhauer Foto

„Opinion is like a pendulum and obeys the same law. If it goes past the centre of gravity on one side, it must go a like distance on the other; and it is only after a certain time that it finds the true point at which it can remain at rest.“

—  Arthur Schopenhauer, libro Parerga y paralipómena

Vol. 2 "Further Psychological Observations" as translated in Essays and Aphorisms (1970), as translated by R. J. Hollingdale
Parerga and Paralipomena (1851), Counsels and Maxims

Immanuel Kant Foto
Kate Bush Foto

„We hang on to every line,
And walk straight down the middle of it.“

—  Kate Bush British recording artist; singer, songwriter, musician and record producer 1958

Song lyrics, The Sensual World (1989)

„To avoid any assertion about the infinitude of the straight line, Euclid says a line segment“

—  Morris Kline American mathematician 1908 - 1992

Fuente: Mathematical Thought from Ancient to Modern Times (1972), p. 175
Contexto: To avoid any assertion about the infinitude of the straight line, Euclid says a line segment (he uses the word "line" in this sense) can be extended as far as necessary. Unwillingness to involve the infinitely large is seen also in Euclid's statement of the parallel axiom. Instead of considering two lines that extend to infinity and giving a direct condition or assumption under which parallel lines might exist, his parallel axiom gives a condition under which two lines will meet at some finite point.

Hans Freudenthal Foto

„A straight line is not the shortest distance between two points.“

—  Madeleine L'Engle American writer 1918 - 2007

Fuente: A Wrinkle in Time: With Related Readings

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