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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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Orr's Circle of the Sciences: The mathematical sciences

William Somerville Orr - Science - 1854 - 532 pages
...centre. The radius of a sphere is a straight line drawn from the centre to any point in the sphere. IV. A straight line drawn through the centre, and terminated both ways by the surface of the sphere, is called the diameter. PROPOSITION I. 'Every section of a tpliere made by aplane...
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A Treatise of Plane Trigonometry,and the Mensuration of Heights and ...

Jeremiah Day - Logarithms - 1855 - 344 pages
...circumference. A semi-circle is half, and a quadrant onefourth of a circle. II. A Diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. A Radius is a straight line extending from the centre to the circumference. A Chord...
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Mensuration of lines, areas, surfaces, and volumes

Robert Rawson - 1856 - 214 pages
...one another. XVL And this point is called the centre of the circle. XVH. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. xvin. A semicircle is the figure contained by a diameter and the par* of the circumference...
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Gradations in Euclid : books i. and ii., with an explanatory preface [&c ...

Euclides - 1858 - 254 pages
...equal. The straight lines from the centre to the circumference are radii. 17. A diameter of a circle is any straight line drawn through the centre, and terminated both ways« by the circumference ; as AB, or DE, in the circle AD BE. A diameter is double of a radius. 18. A semicircle...
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Spherical Trigonometry ...

Isaac Todhunter - Spherical trigonometry - 1859 - 156 pages
...sphere. The straight line which joins any point of the surface with the centre is called a radius. A straight line drawn through the centre and terminated both ways by the surface is called a diameter. 2. Tliz section of the surface of a sphere made by any plane is a circle....
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A Course of Mathematics: Composed for the Use of the Royal Military Academy

Charles Hutton - Mathematics - 1860 - 1022 pages
...two «ff*-" and similar hyperbolas Q\q, Watf, which in this case are called oppotitt , :• bolas. 3. If a straight line be drawn joining the foci, and bisected, the point <•'• • action is called the centre. 4. The distance from ihe centre to cither focus is called...
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Euclid's Elements of plane geometry [book 1-6] explicitly enunciated, by J ...

Euclides - 1860 - 288 pages
...the circumference of a circle is called a radius, as CD, CB, or CE. 20. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference, as BE. 21. A semicircle is the figure contained by a diameter, and the part of the circumference...
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The Quadrature of the Circle: Correspondence Between an Eminent ...

James Smith - Circle-squaring - 1861 - 292 pages
...circumference, are equal to one another. This point within the figure is called the centre of the circle. A straight line drawn through the centre, and terminated both ways by the circumference, is called a diameter of the circle. Do you really mean to deny, that such a circle can...
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Euclid's plane geometry, practically applied; book i, with explanatory notes ...

Euclides - 1863 - 72 pages
...centre to the circumference are radii. 17. A diameter of a circle (diametros, a measure through), is any straight line drawn, through the centre, and terminated both ways by the circumference; as AB, or DE, in the circle ADBE. A diameter is double of a radius, (radius, the spoke...
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The elements of plane geometry; or, The first six books of Euclid, ed. by W ...

Euclides - 1863 - 122 pages
...another. XVI. And this point is called the centre of the circle. XVII. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. XVIII. A semicircle is the figure contained by a diameter and the part of tho circumference...
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