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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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## Stories about Mathematics-land, Volum 2

D. Ponton - 1927 - 168 sider
...contains two right angles. A Plane Figure is any portion of a plane surface bounded by one or more lines. 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, and the straight line drawn from the centre to the circumference...
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## Abraham Lincoln: The Prairie Years, Volum 1

Carl Sandburg - 1926 - 528 sider
...point is that which has no parts and which has no magnitude; (2) a line is length without breadth; (15) a circle is a plane figure contained by one line,...figure to the circumference are equal to one another; (16) and this point is called the centre of the circle. Also it began with Axioms or Common Notions:...
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## The Edinburgh Review, Volum 67

1838 - 596 sider
...property for an axiom ? Will Mr Whewell reason as follows? — ' A circle ' is defined by Euclid to be " a plane figure contained by one ' line, which is called...drawn from a certain point within the figure to the circumfe' rence, are equal to one another." How does it appear that ' any line can have such a character...
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## Popular Science Monthly, Volum 68

1906 - 600 sider
...circle is a plane figure contained by one line, which 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: 16. And this point is called the center of the circle. It is evident that in the first of these statements,...
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## The Sheet-Metal Worker's Instructor

R. H. Warn, John G. Horner - 2002 - 292 sider
...extremity of anything. 11. A figure is that Fig. 3. which is enclosed by one or more boundaries. 12. A. circle is a plane figure contained by one line,...point within the figure to the circumference are equal (Fig. 4). 13. And this point is called the centre of the circle (Fig. 4,0). 14. A diameter of a circle...
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