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The radius of a circle is a right line drawn from the centre to the circumference.
A Course of Mathematics: Designed for the Use of the Officers and Cadets, of ... - Page 172
by Isaac Dalby - 1807

## Euclide's Elements ... compendiously demonstrated, by I. Barrow. Transl

Euclides - 1660 - 368 pages
...thereof, are equall the one to the other. XV I. And that point is called the Centre of the circle. XVII. A Diameter of a circle is a right line drawn through the centre thereof, and ending at the circumference on eii ther Б ther fidejdividing the circle into two equall...

## A Complete System of Land-surveying: Both in Theory and Practice ...

Thomas Breaks - Logarithms - 1771 - 646 pages
...the Out-line or Bound thereof; as D XZ E, every Part of which is equally diftant from its Center Л, 51. The Diameter of a Circle is a right Line drawn through its Center, as 2)^Z, and is 17. the longeft Line that can poffibly be drawn therein, dividing the whole...

## The Elements of Euclid: In which the Propositions are Demonstrated in a New ...

Euclid - Geometry - 1776 - 326 pages
...certain point within the fame are equal. XVI. That point is called the center of the circle. XVII. The diameter of a circle is a right line drawn through the center, and terminated on both ends by the circumference, and divides the circle into two equal parts....

## A Synopsis of Practical Mathematics: Containing Plain Trigonometry ...

Alexander Ewing - Logarithms - 1779 - 476 pages
...arc DB, or of the angle DCB. NB This is fometimes called the complement of an arc to a femicircle. o. The diameter of a circle, is a right line drawn through, the center, and terminated by the circumference, as AB. ID. The radius, is any right line drawn from the...

## Euclid's Elements of Geometry: From the Latin Translation of Commandine, to ...

John Keill - Geometry - 1782 - 476 pages
...Point within the Figure, are equal. XVI. And that Point is called the Centre of the Circle. XVII. A Diameter of a Circle is a Right Line drawn through the Centre, and terminated tn both Sides by the Circumference, and divides the Circle into two equal Parts. XVIII. A Semicircle...

## A Treatise on Mensuration, Both in Theory and Practice

Charles Hutton - Measurement - 1788 - 728 pages
...45- The 45. The radius of a circle, is a right line drawn from the center to the circumference. 46. The diameter of a circle, is a right line drawn through the center, and terminating in the circumference on both fides. 47. An arc of a circle, is part of the...

## Elements of Geometry: Containing the Principal Propositions in the First Six ...

Euclid - Euclid's Elements - 1789 - 296 pages
...DEFINITIONS. I. A radius of a circle, is a right line drawn from the centre to the circumference. 2. A diameter of a circle, is a right line drawn through the centre and terminated both ways by the circumference. 3. An arc of a circle, is any part of its periphery, or circumference....

## A Complete System of Practical Arithmetic, with Various Branches in the ...

William Taylor (teacher of the mathematics.) - Arithmetic - 1800 - 556 pages
...which all right lines drawn from a certain point within the figure, called its center, are equal. 7. The Diameter of a circle, is a right line drawn through the center, terminated at each end by the circumference, and divides the circle into two equal parts, each...