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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 - 1872 - 110 pages

Treatise on Plane and Solid Geometry for Colleges, Schools, and Private Students

Eli Todd Tappan - Geometry - 1873 - 288 pages
...circle. Hence, the following definitions: A CIRCLE is a portion of a plane bounded by a line called a CIRCUMFERENCE, every point of which is equally distant from a point within called the CENTER. 146. Theorem — A circumference is curved throughout. For a straight line can not have...

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
...perpendicular from the vertex of the right angle. 74. The side of a square is to its diagonal as 1 : y/2; or the square described on the diagonal of a square...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...

The Quadrature of the Circle: The Square Root of Two, and the Right-angled ...

William Alexander Myers - Circle-squaring - 1873 - 238 pages
...DEFINITIONS OF PLANE AND RECTILINEAI, SURFACES E H Of the Circle, see Plate 3. 1. A circle is a plain figure bounded by a curved line called the circumference,...every point of which is equally distant from a point withinAnd this point within is called the center A, F, C, B, H, D, G is the circumference and E the...

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...

Cyclopedia of Architecture, Carpentry and Building: Mechanical drawing ...

Architecture - 1909 - 468 pages
...perpendicular distance between the bases. SPHERES. A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center. The radius of a sphere is a straight line drawn from the 49 center to the surface. The...

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...