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CIRCLE is a plane figure bounded by a curved line, all the points of which are equally distant from a point within called the centre; as the figure ADB E.
Elements of Geometry and Trigonometry: With Notes - Page 27
by Adrien Marie Legendre - 1828 - 316 pages

## Scribner's Engineers' and Mechanics' Companion: Comprising United States ...

J. M. Scribner - Mechanical engineering - 1849 - 264 pages
...revolution of an ellipse about either of its axes. 6. A sphere is a solid, terminated by a curved surface, all the points of which are equally distant from a point within, called the center. A sphere may be described by the revolution of a semicircle about a diameter. 7. A radius...

## Practical Arithmetic: Uniting the Inductive with the Synthetic Mode of ...

James Bates Thomson - Arithmetic - 1850 - 352 pages
...diameter is given. (Leg. Y. 11. Sch.) Multiply the given diameter by 3.14159. Note. — The.circumferenee of a circle is a curve line, all the points of which...distant from a point within, called the centre. The diameter of a circle is a straight line which passes through the centre, and is terminated on both...

## Elementary Geometry: With Applications in Mensuration

Charles Davies - Geometry - 1850 - 236 pages
...an acute angle. 23. An obtuse angle is greater than a right angle. Thus, DBC is an obtuse angle. 24. The circumference of a circle is a curve line all the points of which are equally distant from a certain point within called the centre. Thus, if all the points of the curve AEB are equally distant...

## Elementary Geometry: With Applications in Mensuration

Charles Davies - Geometry - 1850 - 218 pages
...the diagonals of a rhombus bisect each other at right angles. BOOK II, OF THE CIRCLE, DEFINITIONS. 1. THE circumference of a circle is a curve line, all the points of which are equally distant from a certain point within called the centre. 2. The circle is the space bounded by this curve line. 3. Every...

## The Elements of Astronomy: Or, The World as it Is, and as it Appears

Anna Cabot Lowell - Astronomy - 1850 - 412 pages
...of a Planet. Sidereal and Apparent Time. § 1. A sphere is a solid terminated by a curved surface, all the points of which are equally distant from a point within called the centre. The radius of a sphere is a straight line drawn from the centre to a point in the surface ; the diameter,...

## Elements of Geometry: With, Practical Applications

George Roberts Perkins - Geometry - 1850 - 332 pages
...prism; hence they will be their lines of contact. 7. A sphere is a solid terminated by a curve surface, all the points of which are equally distant from a point within, called the centre. The sphere m-ay be conceived to be generated by the revolution of a semicircle DAE about its diameter DE;...

## Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1852 - 436 pages
...said to be circumscribed about the pyramid. 9. The SPHERE is a solid terminated by a curved surface, all the points of which are equally distant from a point within, called the centre. The sphere may be generated by the revolution of a semicircle DAE, about its diameter DE : for, the surface...

## Elements of Geometry and Trigonometry: With Applications in Mensuration

Charles Davies - Geometry - 1886 - 334 pages
...DBC is an acute angle23 An obtuse angle is greater than a right angle- Thus, DBC is an obtuse angle24 The circumference of a circle is a curve line all the points of which arc equally distant from a certain point within called the centre, Thus, if all the points of the curve...