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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.
The Elements of Euclid, the parts read in the University of Cambridge [book ... - Page 2
by Euclides - 1846

## Euclid's Elements [book 1-6] with corrections, by J.R. Young

Euclides - 1838
...is less than a right angle. XI. A figure is that which is enclosed by one or more boundaries. XII. A circle is a plane figure contained by one line,...drawn from a certain point within the figure to the circum ference, are equal to one another. XIII. And this point is called the centre of the circle,....

## Elements of geometry: consisting of the first four,and the sixth, books of ...

Euclides - 1842
...which is greater than a right angle. XII. An acute angle is that which is less than a right angle. XIV. A figure is that which is inclosed by one or...figure to the circumference are equal to one another. XVL This point is called the centre of the circle. XVII, A diameter of a circle is a straight line...

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

John Playfair - Euclid's Elements - 1842 - 317 pages
...contained in a figure, without any reference to the nature of the line or lines which bound it.m 1 1 . A circle is a plane figure contained by one line,...figure to the circumference, are equal to one another . 12. And this point is called the centre of the circle. 13. A diameter of a circle is a straight line...

## Lessons on the globes

T H. Howe - 1842
...taken and joined by a straight line, the straight line will lie altogether in that surface or plane. FA Circle is a plane figure, contained by one line which...figure to the circumference, are equal to one another. c That point within the circle which is thus equally distant from the circumference, is called the...

## A system of practical mathematics; being no.xvi. of a new series of school-books

...figure is that which is enclosed by one or more boundaries. 14. A circle is a plain figure bounded by one line, which is called the circumference, and...all straight lines drawn from a certain point within it to the circumference are equal to one another; 15. And this point is called the centre. 16. The...

## The First Six, and the Eleventh and Twelfth Books of Euclid's Elements: With ...

Euclid, James Thomson - Geometry - 1845 - 352 pages
...rhomboid is a parallelogram trhich has not its adjacent sides equal, nor its angles right angles. 30. A circle is a plane figure contained by one line,...which is called the circumference* and is such that R all straight lines drawn from a certain point within the figure to the circumference are equal to...

## A course of practical geometry for mechanics

W. PEASE - 1846
...&c. ; but geometrically, that only is a figure, which has either superficial or solid content. 28*. A Circle is a plane figure contained by one line,...figure to the circumference, are equal to one another. 29*. And this point is called the Centre of the circle. A circle is the superficies or space enclosed...

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

Euclid, John Playfair - Euclid's Elements - 1846 - 317 pages
...contained in a figure, without any reference to the nature of the line or lines which bound it. 11. A circle is a plane figure contained by one line,...figure to the circumference, are equal to one another. 12. And this point is called the centre of the circle. 13. A diameter of a circle is a straight line...