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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

Elements of Arithmetic, Algebra, and Geometry

George Lees - 1826 - 276 pages
...the boundary traced by the remote end of that line its circumference. ELEMENTS Book I. XIV.— The diameter of a circle is a straight line drawn through...centre, and terminated both ways by the circumference. Cor. All radii of the same circle are equal to each other, and to a semi-diameter. XV. — A semicircle...

Euclid's Elements of geometry, transl. To which are added, algebraic ...

Euclides - 1826 - 226 pages
...16. And this point is called the centre of the circle. 17. A diameter of a circle is a certain right line drawn through the centre, and terminated both ways by the circumference of the circle, and divides the circle into two equal parts. 18. A semicircle is the figure contained...

Elements of Geometry, Containing the First Six Books of Euclid

Euclid - 1826 - 234 pages
...16. And this point is called the centre of the circle. 17. A diameter of a circle is a certain right line drawn through the centre, and terminated both ways by the circumference of the circle, and divides the circle into two equal parts. 18. A semicircle is the figure contained...

Elements of Geometry: Being Chiefly a Selection from Playfair's Geometry

John Playfair - Geometry - 1829 - 210 pages
...circumference, and all straight lines drawn from the centre to the circumference are equal to one another. 21. A diameter of a circle is a straight line drawn through...centre, and terminated both ways by the circumference; and a radius is a straight line drawn from the centre to the circumference. 22. A semicircle is the...

A New and Easy Introduction to the Mathematics: Containing. A system of ...

Ira Wanzer - Arithmetic - 1831 - 408 pages
...every part of which is equally distant from a certain point within the circle, called the centre. The diameter of a circle is a straight line drawn through...centre, and terminated both ways by the circumference. 21. An ellipse, or ellipsis, is an oval , figure, resembling a circle, only the length exceeds the...

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

John Playfair - Euclid's Elements - 1832 - 358 pages
...to one another. XII. And this point is called the centre of the circle. XIII. Adiameter of acircle is a straight line drawn through the centre, and terminated both ways by the circumference. \ XIV. A semicircle is the figure contained by a diameter and the part the circumference cut off by...

A Complete System of Mensuration of Superficies and Solids, of All Regular ...

Tobias Ostrander - Measurement - 1833 - 172 pages
...of that circumference. A semicircle is half, and a quadrant is a quarter of a circle. The diameter is a straight line drawn through the centre, and terminated both ways by the circumference. PROBLEM I. To find the circumference of a circle, the diameter being given. Rule—Multiply the diameter...

Geometry Without Axioms; Or the First Book of Euclid's Elements. With ...

Thomas Perronet Thompson - Euclid's Elements - 1833 - 168 pages
...Any straight line drawn from the centre of a sphere to the surface, is called a radius of the sphere. A straight line drawn through the centre and terminated both ways by the surface, is called a diameter of the sphere. COB. A straight line may be described or made to pass...