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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.
Elements of Geometry: Containing the First Six Books of Euclid: With a ... - Side 19
av John Playfair - 1819 - 317 sider
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## Littell's Living Age, Volum 161

1884 - 860 sider
...XV. A circle [cone of revolution with vertex at the eye] is a figure contained by one line [surface] which is called the circumference, and is such that all straight lines [angles] drawn from a certain point within the figure to the circumference are equal to one another....
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## The Weston school manual

Colin Arrott R. Browning - 1884 - 274 sider
...trapeziums. This is practised in laud surveying. (23) A Circle is a plane figure bounded by a curved line called the circumference, and is such that all straight lines drawn from the centre to the circumference are equal. Every such line is called a radius. The Diameter is a straight...
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## Constructive geometry of plane curves

Thomas Henry Eagles - 1885 - 404 sider
...is equal to four times the square on CB. CHAPTER II. THE CIRCLE. EUCLID'S well known definition is " A circle is a plane figure •contained by one line,...and this point is called the centre of the circle". A radius of a circle is a straight line drawn from the centre to the circumference, and therefore by...
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## Constructive Geometry of Plane Curves: With Numerous Examples

Thomas Henry Eagles - 1885 - 401 sider
...is equal to four times the square on CB. CHAPTER II. THE CIRCLE. EUCLID'S well known definition is "A circle is a plane figure contained by one line,...and this point is called the centre of the circle". A radius of a circle is a straight line drawn from the centre to the circumference, and therefore by...
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## The First Six Books of the Elements of Euclid: And Propositions I-XXI of ...

Euclid, John Casey - 1885 - 340 sider
...circle is a plane figure formed by a curved line called the circumference, and is such that all right lines drawn from a certain point within the figure to the circumference are equal to one another. This point is called the centre. xxxin. A radius of a circle is any right line drawn from the centre...
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## The first six books of the Elements of Euclid, and propositions i.-xxi. of ...

Euclides - 1885 - 340 sider
...circle is a plane figure formed by a curved line called the circumference, and is such that all right lines drawn from a certain point within the figure to the circumference are equal to one another. This point is called the centre. xxxm. A radius of a circle is any right line drawn from the centre...
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## The Oldhallian

Wellington Salop, old hall sch - 1885 - 204 sider
...only length and breadth." We next discover that "a circle is a figure contained by straight lines, and is such that all straight lines drawn from a certain point within that circle are equal." We are sorry to say that the inventor of this forgot to draw a figure. We have...
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## The Elements of Plane Geometry:pPart I(corresponding to Euclid Books I.-II ...

Association for the Improvement of Geometrical Teaching - 1888 - 208 sider
...is equal to the rectangle AP, PB together with the square on PQ. DEFINITIONS , OF BOOK III. DEF. i. A circle is a plane figure contained by one line,...circumference, and is such that all straight lines drawn front a certain point within the figure to the circumference are equal to one another. This point is...
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## Practical Surveying: A Text-book for Students Preparing for Examinations Or ...

George William Usill - 1889 - 306 sider
...greater than a right angle. 6. Acute Angle. — An acute angle is less than a right angle. 7. Circle. — A circle is a plane figure contained by one line,...is called the circumference, and is such that all lines drawn from a certain point within the figure to the circumference are equal to one another. 8....
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## First and Fundamental Truths: Being a Treatise on Metaphysics

James McCosh - 1889 - 390 sider
...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...
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