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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.
Gradations in Euclid : books i. and ii., with an explanatory preface [&c ... - Page 180
by Euclides - 1858

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

Scottish school-book assoc - 1845 - 434 pages
...is enclosed by one or more boundaries. 14. A circle is a plain figure bounded by one line, which is called the circumference, and is such that 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 Elements of Geometry, Symbolically Arranged

Great Britain. Admiralty - Geometry - 1846 - 130 pages
...which is enclosed by one or more boundaries. XV. Acircleis aplanefigure contained by one line, which is called the circumference, and is such, that all straight...figure to the circumference, are equal to one another. XVI. And this point is called the centre of the circle. XVII. A diameter of a circle is a straight...

## The Elements of Geometry, Symbolically Arranged

Great Britain. Admiralty - Geometry - 1846 - 130 pages
...is enclosed by one or more boundaries. XV. Acircle is aplane figure contained by one line, which is called the circumference, and is such, that all straight...figure to the circumference, are equal to one another. XVI. And this point is called the centre of the circle. XVII. A diameter of a circle is a straight...

## The Elements of Euclid, the parts read in the University of Cambridge [book ...

Euclides - 1846 - 292 pages
...inclosed by one or more boundaries. xv. A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight...figure to the circumference, are equal to one another : xvi. And this point is called the centre of the circle. xvn. A diameter of a circle is a straight...

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

John Playfair - Euclid's Elements - 1846 - 332 pages
...of the line or lines which bound it. 11. A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight...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...

## A Technological Dictionary: Explaining the Terms of the Arts, Sciences ...

W. M. Buchanan - Science - 1846 - 768 pages
...in her magical operations. CIB'CLB, Lat. circulus, from circus. A geometrical figure contained under one line called the circumference ; and is such, that...lines drawn from a certain point within the figure called the centre, to the circumference, arc equal to one another. Thus, In the figure, AB = AC = AD....

## The First Book of Euclid's Elements, Simplified, Explained, and Illustrated ...

Euclides - 1847 - 128 pages
...contained in any figure is called its area. 15. A circle is a plane figure contained by one line, which is called the circumference; and is such that all straight...figure to the circumference, are equal to one another : — 16. And this point is called the centre of the circle. 17. A diameter of a circle is a straight...

## Elements of Geometry: With Practical Applications ...

George Roberts Perkins - Geometry - 1847 - 308 pages
...[See Elements of Algebra, Art. 178.] XXIII. A circle is a plane figure bounded by one line, which is called the circumference ; and is such that all straight lines drawn from a certain point within the circle to the circumference, are equal to one another. This point is called the centre of the circle....