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A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
An Elementary Geometry - Page 49
by William Frothingham Bradbury - 1873 - 110 pages

A Natural Philosophy: Embracing the Most Recent Discoveries in the Various ...

George Payn Quackenbos - Physics - 1872 - 472 pages
...changes its direction at every point ; as, G H. 4. A Circle is a figure bounded by a curve, every pomt of which is equally distant from a point within, called the Centre. Fig. 10 represents a circle, and E its centre. 5. The Circumference of a circle is the curve that bounds...

An Elementary Geometry and Trigonometry

William Frothingham Bradbury - Geometry - 1873 - 288 pages
...the square described on the diagonal of a square is double the square itself. BOOK III. THE CIRCLE. DEFINITIONS. 1 , A Circle is a plane figure bounded...point within called the centre ; as ABD E. 2« The Badins of a circle is a line drawn from the centre to the circumference ; as С D. 3« The Diameter...

Elements of Analytical Geometry, and of the Differential and Integral Calculus

Gerardus Beekman Docharty - Calculus - 1865 - 328 pages
...of intersection. CHAPTER II. ON THE CIRCLE. (28.) The circumference of the circle is a plane curve, every point of which is equally distant from a point within called the centre. PROPOSITION I. (29.) The equation of the circle referred to oblique axes is (xx'Y+(yy'Y±1(xx') (y-y1)...

The Illustrative Practical Arithmetic ...

George Augustus Walton - Arithmetic - 1873 - 348 pages
...slate, is a plane surface. Fig. 1. 326. A plane surface, as in Fig. 1, bounded by a line, every part of which is equally distant from a point within, called the centre, is a Circle. 327. The bounding line is called the Circumference of the circle. Any part of the circumference...

The Complete Arithmetic, Oral and Written: Second Part

Daniel W. Fish - Arithmetic - 1874 - 302 pages
...of each separately. The sum of these areas will be the area of the whole polygon. THE CIRCLE. 9O1. A Circle is a plane figure bounded by a curved line,...which is equally distant from a point within called the center. 902. The Diameter of a circle is a line passing through its center, and terminated at both...

The Complete Arithmetic: Oral and Written

Daniel W. Fish - Arithmetic - 1874 - 538 pages
...of each separately. The enm of these areas will be the area of the whole polygon. THE CIRCLE. 9O1. A Circle is a plane figure bounded by a curved line,...which is equally distant from a point within called the center. 902. The Diameter of a circle is a line passing through its center, and terminated at both...

A Practical Arithmetic

...do so with some accuracy. ANGLE MEASURE 225. A Circle is a plain surface bounded by a curved line, the circumference, every point of which is equally distant from a point within, called the Centre. 226. A straight line drawn through the centre of a circle from one point in the circumference to another...

Walton and Holmes's Arithmetics: 1st Book-, Book 4

George Augustus Walton, Stanley Harry Holmes - Arithmetic - 1909 - 316 pages
...made up of an infinite number of triangles. CONE 286. A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within, called the center. A straight line passing through the center of a sphere and terminating at both ends in...