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" ... is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16. And this point is called the centre of the circle. "
A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ... - Page 197
by Nathan Scholfield - 1845
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Spherical Trigonometry: For the Use of Colleges and Schools

Isaac Todhunter - Spherical trigonometry - 1863 - 132 pages
...sphere. The straight line which joins any point of the surface with the centre is called a radiw. A straight line drawn through the centre and terminated both ways by the surface is called a diameter. 2. The section of the surface of a sphere made by any plane is a circle....
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Elements of plane geometry, book i, containing nearly the same propositions ...

Euclides - 1865 - 80 pages
...same circle are equal, for each of them is equal to the radiant. 35. The DIAMETER of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. 36. An ARC of a circle is any part of the circumference. 37. Magnitudes which coincide...
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The College Euclid: Comprising the First Six and the Parts of the Eleventh ...

Euclides - 1865 - 402 pages
...another. XVI. And this point is called the centre of the circl*. XVII. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circum/ ference. NB — When several angles are at one point B, any one of them is expressed by three...
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An English primer; compiled under the superintendence of E.C. Lowe

Edward Clarke Lowe - 1866 - 172 pages
...one another. 1C. And this point is called the centre of the circle. 17. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. 18. A semicircle is the figure contained by a diameter and the part of the circumference...
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The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...one another : 16. And this point is called the centre of the circle. 17. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. [A radius of a circle is a straight line drawn from the centre to the circumference.]...
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Elements of Plane and Solid Geometry: And of Plane and Spherical ...

Gerardus Beekman Docharty - Geometry - 1867 - 474 pages
...straight line drawn from the centre to any point on the surface. The diameter or axis of a sphere is a straight line drawn through the centre, and terminated both ways by the surface. It appears from Definition 1 that all the radii of the same sphere are equal, and that all...
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Elementary Mensuration for the use of schools, etc

Septimus Tebay - Measurement - 1868 - 168 pages
...13. A radius is a straight line drawn from the centre to the circumference (CD). 14. A diameter is a straight line drawn through the centre, and terminated both ways by the circumference (AE) . 15. A semicircle is the figure contained by a diameter and part of the circumference...
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Mensuration for Beginners: With Numerous Examples

Isaac Todhunter - Measurement - 1869 - 312 pages
...radius of a sphere is a straight line drawn from the centre to the surface. A diameter of a sphere is a straight line drawn through the centre, and terminated both ways by the surface. The intersection of a sphere with any plane is a circle ; if the plane passes though the centre...
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A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - Geometry - 1871 - 380 pages
...O. A radius of the sphere is any straight line drawn from the centre to the surface. A diameter is any straight line drawn through the centre and terminated both ways by the surface. Since all the radii are equal and every diameter is double the radius, all the diameters are...
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Elements of geometry, containing the first two (third and fourth ..., Part 1

Euclides - 1871 - 136 pages
...from the centre of a circle to the circumference is called a RADIUS. XV. A DIAMETER of a circle is a straight line drawn through the centre and terminated both ways by the circumference. Tims, in the diagram, 0 is the centre of the circle ABCD, OA, OB, OC, OD are Badii of...
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