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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 : 16. "
The Elements of Euclid, the parts read in the University of Cambridge [book ... - Page 2
by Euclides - 1846
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The First Book of Euclid's Elements, Simplified, Explained, and Illustrated ...

Euclides - 1847
...enclosed by one or more boundaries. The quantity of space contained in any figure is called its area. 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. 17. A diameter of a circle is a straight...
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Elements of Geometry: With Practical Applications ...

George Roberts Perkins - Geometry - 1847 - 308 pages
...expression, in ( n — 3). [See Elements of Algebra, Art. 178.] XXIII. A circle is a plane figure bounded by one line, which is called the circumference ; and...straight lines drawn from a certain point within the circle to the circumference, are equal to one another. This point is called the centre of the circle....
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The Philosophy of the Inductive Sciences: Founded Upon Their History, Volume 1

William Whewell - Science - 1847
...circle, — " that it is a figure contained by one line, which is called the circumference, and which is such, that all straight lines drawn from a certain point within the circumference are equal to one another," — we were to substitute an axiom and a definition, as follows...
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The definitions, postulates, axioms, and enunciations of the propositions of ...

Euclides - 1848
...is greater than a right angle. XII. An acute angle is that which is less than a right angle. XIII. XIV. A figure is that which is inclosed by one or...equal to one another. XVI. And this point is called ttas centre of the circle. XVII. A diameter of a circle is a straight line drawn through the centre,...
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Lessons on the delineation of form

Charles Richson - 1848
...DEFINITIONS, which may be illustrated by the diagrams; and upon which suitable questions may be asked. 1. "A circle is a plane figure, contained by one line,...figure to the circumference are equal to one another/' "And this point is called the centre of the circle." (A pair of dividers or compasses will be useful...
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The first three books of Euclid's Elements of geometry, with theorems and ...

Euclides, Thomas Tate - 1849 - 108 pages
...called a perpendicular — to it. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which is less than a right...figure to the circumference are equal to one another. A VI. And this point is called the centre of the circle. XVII. A diameter of a circle is a straight...
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Rudimentary Dictionary of Terms Used in Architecture, Civil ..., Volumes 1-2

John Weale - Architecture - 1850 - 564 pages
...&c., for describing circles, measuring distances, and taking the thickness of solids Circle, a plain figure contained by one line, which is called the...figure to the circumference are equal to one another, and this point is called the centre of the circle The circumference of a circle is known to be about...
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Rudimentary dictionary of terms used in architecture [&c.].

John Weale - 1850
...&c., for describing circles, measuring distances, and taking the thickness of solids Circle, a plain figure contained by one line, which is called the...figure to the circumference are equal to one another, and this point is called the centre of the circle Circular saw. Circular saws, revolving upon an axis,...
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Elements of Geometry: With, Practical Applications

George Roberts Perkins - Geometry - 1850 - 320 pages
...five, and so on for polygons of a greater number of sides. XXIII. A circle is a plane figure bounded by one line, which is called the circumference; and...straight lines drawn from a certain point within the circle to the circumference, are equal to one another. This point is called the centre of the circle....
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Reports on Elementary schools

Her MAjesty' Inspectors of schools - 1850
...iif tin: following definitions, of a circle and parallel straight lines, point out two eirurs. (1.) 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 are equal to one anollirr. 3. Eucliil says, "If...
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