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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.
The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ... - Σελίδα 3
των Robert Simson - 1762 - 466 σελίδες
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Elements of Geometry: Containing the First Six Books of Euclid: With a ...

John Playfair - 1855 - 317 σελίδες
...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 .mother and are called radii 12. And this point is called the centre of the circle. 13. A diameter...

The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - 1867 - 400 σελίδες
...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. And this point is called the centre of the circle. 17. A diameter of a circle is a straight line...

Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - 1868 - 410 σελίδες
...called the circumference, and is such that all straight lines drawn from a certain point within tie figure to the circumference, are equal to one another....center of the circle. XVII. A diameter of a circle is a straight line drawn through the center, and terminated both ways by the circumference. XVIIL A semicircle...

Mensuration for Beginners: With Numerous Examples

Isaac Todhunter - 1869 - 296 σελίδες
...a plane figure bounded by one lino 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: this point is called the centre of the circle. A radius of a circle is a straight line drawn from the...

The Educational Speeches of the Hon'ble John Bruce Norton

John Bruce Norton - 1870 - 329 σελίδες
...allusion to it as " a plain figure contained by one line called the circumference, and such that all right lines drawn from a certain point within the figure to the circumference are equal to one another?" Why then should we stumble or 'be offended at the use of such terms as " Estopell," "Alimony," " Certiorari,"...

An Elementary Course of Plane Geometry

Richard Wormell - 1870 - 16 σελίδες
...compasses. 43. A circle is a figure contained by one line, termed the circumference, such that all straight lines drawn from a certain point within the figure to the circumference are equal. If we place one of the points of a pair of compasses upon a perfectly even board, and the compasses...

The Southern Review, Τόμος 9;Τόμος 12;Τόμος 15

1871
...plane figure contained by a line, which is called its circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.' Thus the circle, as defined by them, ia ' a plane figure- ' that is, a figure described in a plane,...

The popular educator, Τόμος 1;Τόμος 29

Popular educator - 1872
...contained or bounded by a canal line, called the circumference or periphery, which is snch that aU straight lines drawn from a certain point within the figure to the circumference are equal to each other. This point Kg. 6. Fig. 7. is called the centre of the circle, and each of tho straight...

The Acting Teacher's and Student's in Training Guide and Text Book for ...

Henry Major - 1873
...A circle is a plane figure contained by one line, called the circumference, such that all straight lines drawn from a certain point within the figure...to the circumference are equal to one another. XVI. This point is called the centre. XVII. A diameter of a circle is a straight line drawn through the...

A School Euclid. Being Books I.&II. of Euclid's Elements. With Notes ...

Euclides - 1874
...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. And this point is called the centre of the circle. 17. A diameter of a circle is a straight line...