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

Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...enclosed by one or more boundaries. 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 line... ## Elementary mensuration

Septimus Tebay - Measurement - 1868 - 168 pages
...9. An obtuse angle is greater than a right angle. 10. An acute angle is less than a right angle. 11. A circle is a plane figure contained by one line,...all straight lines drawn from a certain point within it to the circumference are equal to one another. 12. And this point is called the centre of the circle... ## Modern Methods in Elementary Geometry

E. M. Reynolds - Geometry - 1868 - 172 pages
...serious attention. As the circle is necessary to our constructions, we give here the ordinary definition. A circle is a plane figure contained by one line called the circumference, and is such that all lines drawn from a point within it to the circumference are equal. This point is called the centre... ## Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - 1868 - 434 pages
...is the extremity of any thing. xrv. XV. 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 tie figure to the circumference, are equal to one another. XVI. And this point is called the center... ## Mensuration for Beginners: With Numerous Examples

Isaac Todhunter - Measurement - 1869 - 312 pages
...which are not adjacent is also called a 15. A circle is a plane figure bounded by one lino which is called the circumference, and is such that all straight...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... ## An Elementary Course of Plane Geometry

Richard Wormell - Geometry, Plane - 1870 - 304 pages
...Circumferences.— Use of compasses. 43. A circle is a figure contained by one line, termed the circumference, such that all straight lines drawn from a certain...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 Educational Speeches of the Hon'ble John Bruce Norton

John Bruce Norton - Education, Higher - 1870 - 350 pages
...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,"... ## Explanatory mensuration for the use of schools

Alfred Hiley - 1871 - 184 pages
...; but if the sides are unequal, and also the angles unequal, then it is an irregular polygon. XXIX. A circle is a plane figure contained by one line, called the circumference, and is such that all the straight lines drawn from / a certain point within it to the A circumference are equal to one another.... ## The Southern Review, Volume 9; Volume 12; Volume 15

1871 - 788 pages
...Euclid and Montucla have written in vain. According to their definition, the circumference of a circle 'is such, that all straight lines drawn from a certain point within the figure ,' etc. How in the world could such a point be otherwise than ' within the figure?' IB there any such... 