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A circle is a plane figure contained by one line, which is called the circumference, and 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...
Mensuration of lines, areas, surfaces, and volumes - Page xiii
by Robert Rawson - 1856

Spherical Trigonometry, for the Use of Colleges and Schools: With Numerous ...

Isaac Todhunter - Spherical trigonometry - 1879 - 176 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. The section qf the surface of a sphere made by any plane is a circle....

First B.A. Examination, University of London: A Hand-book to the Study of ...

J. G - 1878 - 408 pages
...of the centre, we know the position of the sphere, Two sphe.es are equal when their radii are equal. A straight line drawn through the centre and terminated both ways by the surface is called a diameter. A sphere is supposed to be engendered by the revolution of a semicircle...

Queen's scholarship examination. Amner's eight years' scholarship questions ...

Joseph Wollman - 1879 - 120 pages
...for 1877, Section I., as these two questions were given that year, (c) This definition is incomplete. A diameter of a circle is a straight line drawn through...centre, and terminated both ways by the circumference. The following statements are incorrect : — (1) If unequals be added to unequals the wholes are unequal....

Moffatt's pupil teachers' course (ed. by T. Page). Candidates, 2nd (-4th) year

Moffatt and Paige - 1879 - 426 pages
...circumference are equal to one another. 16. And this point is called the centre of the circle. 1 7. A diameter of a circle is a straight line drawn through...centre and terminated both ways by the circumference. 1 8. A semicircle is the figure contained by a diameter and the part of the circumference cut off by...

Euclid, books i. & ii., with notes, examples, and explanations, by a late ...

Euclides - 1879 - 146 pages
...circumference, are equal to one another. 1 6. And this point is called the centre of the circle. 17. A diameter of a circle is a straight line drawn through...centre, and terminated both ways by the circumference. [A radius is a straight line drawn from the centre to the circumference, and is therefore half the...

The Elements of Plane and Solid Geometry: With Chapters on Mensuration and ...

Isaac Sharpless - Geometry - 1879 - 282 pages
...lines are called radii, and this point is the centre of the circle. 32. A diameter of a circle is the straight line drawn through the centre, and terminated both ways by the cuctnnference. 33. A semicircle is the figure contained by the diameter and the part of the circumference...

The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ...

Isaac Todhunter - Euclid's Elements - 1880 - 426 pages
...circumference are equal to 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...centre, and terminated both ways by the circumference. [A radius of a circle is a straight line drawn from the centre to the circumference.] 18. A semicircle...

Euclid for beginners, books i. and ii., with simple exercises by F.B. Harvey

Euclides, Frederick Burn Harvey - Geometry - 1880 - 178 pages
...therefore, 90 degrees ; an obtuse angle contains more, and an acute angle less, than 90 degrees. 16. A DIAMETER OF A CIRCLE is a straight line drawn through...centre, and terminated both ways by the circumference. Thus BAG and DAE are diameters. A straight line drawn in a circle, not through the centre, and terminated...