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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.
Instructions Given in the Drawing School Established by the Dublin Society ... - Page 4
by Joseph Fenn - 1769

The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1762 - 488 pages
...extremity of any thing." XIV. A figure is that which is inclofed by one or more boundaries. XV. Book I. A circle is a plane figure contained by one line,...circumference, and is fuch that all ftraight lines drawn from a certain point within the figure to the circumference, are equal to one another. XVI. And...

The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - Trigonometry - 1775 - 534 pages
...the extremity of any thing." XIV. A figure is that which is inclofed by one or more boundaries. XV. XV. . A circle is a plane figure contained by one...circumference, and is fuch that all ftraight lines drawn from a certain point within the figure to the circumference, are equal to one another : XVI....

The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 550 pages
...any thing." At. V« A figure is that which is inclbfed by one or more boundaries XV. Book I. A cirele is a plane figure contained by one line, which is...circumference, and is fuch that all ftraight lines drawn from a certain point within the figure to the circumference, are equal to one another : XVI....

Observations on the Nature of Demonstrative Evidence: With an Explanation of ...

Thomas Beddoes - Geometry - 1793 - 196 pages
...confider fuch angles, with a view to take their relative dimenfions accurately. DEFINITION xv and xvi. A circle is a plane figure contained by one line,...is called the circumference, and is fuch, that all Jlraight lines drawn from a certain point, ivitbin the figure to the circumference, are equal to one...

Elements of Geometry;: Containing the First Six Books of Euclid, with Two ...

Euclid, John Playfair - Euclid's Elements - 1795 - 462 pages
...which is lefs than a right angle. X. A figure is that which is inclofed by one or more boundaries. XI. A circle is a plane figure contained by one line,...circumference, and is fuch that all ftraight lines drawn from a certain point within the figure to the circumference, are equal to one another. XII. And...

The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

Alexander Ingram - Trigonometry - 1799 - 374 pages
...XIII. Omitted. XIV. A figure is that which is inclofed by one or more boundaries. XV. XV. BOOK. I. A circle is a plane figure contained by one line,...circumference, and is fuch that all ftraight lines drawn from a certain point within the figure to the circumference, are equal to one another: XVI. And...

The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

Robert Simson - Trigonometry - 1804 - 530 pages
...thing." XIV. A figure is that which is inclofed by one or more boundaries XV. Book A circle is a plain figure contained by one line, which is called the circumference, and is fuch that all ftraight lines drawn from a certain point within the figure to the circumference, are equal to one another. - X/K...

A Practical Treatise of Perspective, on the Principles of Dr. Brook Taylor

Edward Edwards - Perspective - 1806 - 414 pages
...properties of right lines and angles, it will be neceflary to fpeak of the circle. A CIRCLE is a plain figure contained by one line, which is called the...circumference, and is fuch, that all ftraight lines drawn from a certain point within the figure to the circumference, are equal to one another. The point...