Book 1, Proposition 9.
On the Equilibrium of Planes
“In any triangle the centre of gravity lies on the straight line joining any angle to the middle point of the opposite side.”
—
Archimedes
,
book
On the Equilibrium of Planes
Book 1, Proposition 13.
On the Equilibrium of Planes
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Archimedes 20
Greek mathematician, physicist, engineer, inventor, and ast… -287–-212 BCRelated quotes
Book 1, Proposition 14.
On the Equilibrium of Planes
Book 1, Proposition 4.
On the Equilibrium of Planes
Proposition 6.
The Method of Mechanical Theorems
“The centre of gravity of any cylinder is the point of bisection of the axis.”
Proposition presumed from previous work.
The Method of Mechanical Theorems
Aristarchus of Samos
ancient Greek astronomer and mathematician
p, 125
On the Sizes and Distances of the Sun and the Moon (c. 250 BC)
Thomas Little Heath
(1861–1940) British civil servant and academic
this implies the use of similar triangles in the way that the Egyptians had used them in the construction of pyramids
Achimedes (1920)
of the portion adjacent to the base
Proposition presumed from previous work.
The Method of Mechanical Theorems
“The centre of gravity of a parallelogram is the point of intersection of its diagonals.”
Book 1, Proposition 10.
On the Equilibrium of Planes
