| 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... | |
| 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
...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... | |
| 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... | |
| 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... | |
| 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,... | |
| 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.... | |
| 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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