 | James Thomson - 1880 - 406 pages
...angles which are not adjacent to one another. XVII. A CIRCLE is a figure contained, on a flat surface, by one line which is called the CIRCUMFERENCE ; and is such that all straight lines drawn to the circumference from a certain point within the figure, called the CENTRE, are equal to each other.... | |
 | Euclides, Frederick Burn Harvey - Geometry - 1880 - 178 pages
...which is contained by one or more boundaries. 15. A CIRCLE is a plane figure contained by one line called the CIRCUMFERENCE, and is such that all straight lines drawn from a certain point within it, called the CENTRE, to the circumference are equal to each other. Each of such equal straight lines... | |
 | Sir Norman Lockyer - Electronic journals - 1880 - 668 pages
...VII. — A plane figure is a portion of a plane surface inclosed by a line or lines. "Def. VIII. — \circle is a plane figure contained by one line, which is called the circumference, &c. "Def. XXII. — A plane rectilineal figure is a portion of a plane surface inclosed by straight... | |
 | Euclides - Euclid's Elements - 1881 - 238 pages
...figurca, u well u to plane figures XV. A circle is a plane figure contained [or, bounded] by •>ae line, which is called the circumference, and is such...figure to the circumference, are equal to one another. The circumference of a circle ie its boundary. The space contained within the boundary, \s called the... | |
 | Education - 1882 - 676 pages
...them lies wholly in that superficies. An obtuse angle is that which is greater than a right angle. A circle is a plane figure contained by one line which...circumference, and is such that all straight lines drawn from я certain point (called the centre) within the figure to the circumference are equal to one another.... | |
 | James McCosh - Intuition - 1882 - 472 pages
...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... | |
 | Marianne Nops - 1882 - 278 pages
...the definition of a circle (def. 15). It is to the latter part that I wish to draw your attention, ' and is such that all straight lines drawn from a certain point (the centre) within the figure to the circumference are equal.' Here is a mode of measuring the lines... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1883 - 432 pages
...is the extremity of any thing. 14. A figure is that which is enclosed by one or more boundaries. 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 lino... | |
 | Euclides - 1883 - 176 pages
...that of an angle, which is one not " enclosed." 11. A circle is a plane figure bounded by one line called the circumference, and is such that all straight...to the circumference are equal to one another. 12. This point is called the centre of the circle. A radius is a straight line from the centre to the circumference... | |
 | Mathematical association - 1883 - 86 pages
...in that surface. DEF. 7. A plane figure is a portion of a plane surface enclosed by a line or lines. straight lines drawn from a certain point within the...figure to the circumference are equal to one another. This point is called the centre of the circle. DEF. 9. A radius of a circle is a straight line drawn... | |
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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. 
