| Geometry - 1846
...thing. XIV. A figure is that which is enclosed by one or more boundaries. XV. Acircleis aplanefigure **contained by one line, which is called the circumference,...And this point is called the centre of the circle.** XVII. A diameter of a circle is a straight line drawn through the centre, and terminated both wa\s... | |
| William Pease - 1846
...&c. ; but geometrically, that only is a figure, which has either superficial or solid content. 28*. **A Circle is a plane figure contained by one line,...figure to the circumference, are equal to one another.** 29*. And this point is called the Centre of the circle. A circle is the superficies or space enclosed... | |
| John Playfair - Euclid's Elements - 1846 - 317 pages
...contained in a figure, without any reference to the nature of the line or lines which bound it. 11. **A circle is a plane figure contained by one line,...figure to the circumference, are equal to one another.** 12. And this point is called the centre of the circle. 13. A diameter of a circle is a straight line... | |
| W. M. Buchanan - Science - 1846 - 755 pages
...magical operations. CIB'CLB, Lat. circulus, from circus. A geometrical figure contained under one line **called the circumference ; and is such, that all straight...lines drawn from a certain point within the figure** called the centre, to the circumference, arc equal to one another. Thus, In the figure, AB = AC = AD.... | |
| Euclides - 1846
...called acute. 14. A plane figure is a plane superficies, bounded on every side by one or more lines. 15. **A circle is a plane figure, contained by one line, which is called the circumference** ; to which from a certain point within the figure, all right lines drawn are equal. 16. That point... | |
| William Trollope - 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... | |
| 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.... | |
| William Whewell - Science - 1847 - 679 pages
...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... | |
| 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,... | |
| 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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