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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, containing the first six books, with a selection of ... - Σελίδα 1
των Euclides - 1874
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## A treatise on arithmetic. [With] Key, Τόμος 1

James Thomson - 1880 - 412 σελίδες
...angles which are not adjacent to one another. XVII. A CIRCLE is a figure contained, on a flat surface, by one line which is called the CIRCUMFERENCE ; and is such that all straight lines drawn to the circumference from a certain point within the figure, called the CENTRE, are equal to each other....

## Euclid for beginners, books i. and ii., with simple exercises by F.B. Harvey

Euclides, Frederick Burn Harvey - 1880 - 178 σελίδες
...which is contained by one or more boundaries. 15. A CIRCLE is a plane figure contained by one line called the CIRCUMFERENCE, and is such that all straight lines drawn from a certain point within it, called the CENTRE, to the circumference are equal to each other. Each of such equal straight lines...

## Nature, Τόμος 21

Sir Norman Lockyer - 1880 - 668 σελίδες
...VII. — A plane figure is a portion of a plane surface inclosed by a line or lines. "Def. VIII. — \circle is a plane figure contained by one line, which is called the circumference, &c. "Def. XXII. — A plane rectilineal figure is a portion of a plane surface inclosed by straight...

## The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1881 - 236 σελίδες
...figurca, u well u to plane figures XV. A circle is a plane figure contained [or, bounded] by •>ae line, which is called the circumference, and is such...figure to the circumference, are equal to one another. The circumference of a circle ie its boundary. The space contained within the boundary, \s called the...

## The Practical Teacher, Τόμος 1,Τεύχος 1

1882 - 676 σελίδες
...them lies wholly in that superficies. An obtuse angle is that which is greater than a right angle. A circle is a plane figure contained by one line which...circumference, and is such that all straight lines drawn from я certain point (called the centre) within the figure to the circumference are equal to one another....

## Intuitions of the Mind: Inductively Investigated

James McCosh - 1882 - 472 σελίδες
...any length in a straight line ;" " There may be such a figure as a circle, that is, a plane figure such that all straight lines drawn from a certain point •within the figure are equal to one another ;" and that " A circle may be described from any centre at any distance from...

## Class lessons on Euclid

Marianne Nops - 1882 - 278 σελίδες
...the definition of a circle (def. 15). It is to the latter part that I wish to draw your attention, ' and is such that all straight lines drawn from a certain point (the centre) within the figure to the circumference are equal.' Here is a mode of measuring the lines...

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

Euclid, Isaac Todhunter - 1883 - 426 σελίδες
...is the extremity of any thing. 14. A figure is that which is enclosed by one or more boundaries. 15. A circle is a plane figure contained by one line,...the circle. 17. A diameter of a circle is a straight lino drawn through the centre, and terminated both ways by the circumference. [A radius of a circle...

## Moffatt's pupil teachers' course (ed. by T. Page). Candidates, 2nd ..., Τόμος 4

Moffatt and Paige - 1883 - 602 σελίδες
...in which, if any two points are taken, the straight line joining them lies entirely in that surface. A Circle is a plane figure contained by one line,...figure to the circumference are equal to one another. This point is called the Centre of the circle. Any straight line drawn from the centre to the circumference...

## Geometry for schools, comprising books i. and ii. of Euclid, with some ...

Euclides - 1883 - 176 σελίδες
...that of an angle, which is one not " enclosed." 11. A circle is a plane figure bounded by one line called the circumference, and is such that all straight...figure to the circumference are equal to one another. 12. This point is called the centre of the circle. A radius is a straight line from the centre to the...