The surface of any segment of a sphere is equal to a circle whose radius is the straight line drawn from the vertex of the segment to any point on the circumference of its base.
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"The proportion of any sphere to the cylinder circumscribing it is as 2 to 3."
"There are some who think that the number of the sand is infinite in multitude."
"My inventions are not for war, but for the glory of science."
"The sphere is the most perfect of all solids."
"It is a property of the circle that the ratio of its circumference to its diameter is the same for all circles."
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