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A sphere is a solid figure described by the revolution of a semicircle about its diameter, which remains unmoved.
Lessons on the delineation of form - Σελίδα 68
των Charles Richson - 1848
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## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1806 - 320 σελίδες
...every opposite two are parallel. VI. A cube is a solid figure contained by six equal squares. > VII. A sphere is a solid figure described by the revolution of a semicircle about a diameter, which remains unmoved. ; VIII. The axis of a sphere is the fixed straight line about which...

## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1806 - 546 σελίδες
...are opposite are equal, similar, and parallel to one another ; and the others parallelograms. XIV. A sphere is a solid figure described by the revolution of a semici rcle about its diameter, which remains unmoved. XV. The axis of a sphere is the fixed straight...

## The British encyclopedia, or, Dictionary of arts and sciences, Τόμος 3

William Nicholson - 1809 - 752 σελίδες
...is equally distant from a point within called its centre. Euclid defines Ihr globe or sphere, to bè a solid figure described by the revolution of a semi-circle about its diameter, which remains unmoved. Also, its axis is the fixed line or diameter about which the semi-circle revolves ; and its centre...

## The British Encyclopedia: Or, Dictionary of Arts and Sciences ..., Τόμος 3

William Nicholson - 1809 - 700 σελίδες
...is equally distant from a point within called its centre. Euclid defines the globe or sphere, to be a solid figure described by the revolution of a semi-circle about its diameter, which remains unmoved. Also, its axis is the fixed line or diameter abeut which the semi-circle revolves ; and its centre...

## A Treatise of Plane and Spherical Trigonometry: In Theory and Practice ...

Francis Nichols - 1811 - 162 σελίδες
...where equally distant from a point within it called the centre. A sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains unmoved, and is called the axis of the sphere. 2. A diameter of a sphere is a straight line passing through...

## The Elements of Euclid; viz. the first six books, together with the eleventh ...

Euclides - 1814 - 560 σελίδες
...that are opposite arc equal, similar, and parallel to one another: and the others parallelograms. XIV. A sphere is a solid figure described by the revolution...semicircle about its diameter, which remains unmoved. •'XV. The axis of a sphere is the fixed straight line about which the semicircle revolves. XVI. The...

## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclides - 1816 - 588 σελίδες
...are opposite are equaj, similar, and parallel to one another : and the others parallelograms. XIV. A sphere is a solid figure described by the revolution...semicircle about its diameter, which remains unmoved. ' XV" The axis of a sphere is the fixed straight line about which the semicircle revolves. ' , XVI....

## American Edition of the British Encyclopedia: Or, Dictionary of ..., Τόμος 6

William Nicholson - 1819 - 394 σελίδες
...is equally distant from a point within, called its centre. Euclid defines the globe or sphere, to be a solid figure described by the revolution of a semi-circle about its diameter, which remains unmoved. Also, its axis is the fixed line or diameter about which the semi-circle revolves ; and its centre...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1819 - 350 σελίδες
...every opposite two are parallel. XI. A cube is a solid figure contained by. six. equal square*. VII. A sphere is a solid figure described by the revolution of a semicircle about a diameter, which remains unmoved. VIII. The axis of a sphere is the fixed straight line about which...

## A general view of the sciences and arts, Τόμος 1

William Jillard Hort - 1822 - 308 σελίδες
...circle. The truth of this proposition is evident from the definition which geometry gives of a sphere. A sphere is a solid figure, described by the revolution of a demi-circle about a diameter. Definitions. - 1. Any circle, which is a section of a sphere, by a plane...