 | Elias Loomis - Conic sections - 1849 - 252 pages
...a point within, called the center. This bounding line is called the circumference of the circle. 2. A radius of a circle is a straight line drawn from the center to the circumference. A diameter of a circle is a straight line passing through the center, and terminated both ways by the... | |
 | Seba Smith - Geometry - 1850 - 214 pages
...plane surface is composed of straight lines. 42. A curved surface is composed of curved lines. 43. The radius of a circle is a straight line drawn from the center to the circumference ; — and because a circle has an equal extension in every direction from the center to the circumference,... | |
 | Elias Loomis - Calculus - 1851 - 300 pages
...sin. v. SCHOLIUM. If the pole A' be placed at the origin A, these equations will become x=r cos. «, y=r sin. v. SECTION IT. ON THE CIRCLE. (32.) A CIRCLE...(33.) The equation of the circle, when the origin of co-ordi" nates is at the center, is x'+t/'=R' ; where R is the radius of the circle, and x and y the... | |
 | Euclid - Geometry - 1853 - 176 pages
...15. The CENTER of a circle is a point within the figure equally distant from its circumference. 16. A RADIUS of a circle is a straight line drawn from the center to the circumference, 17. A DIAMETER of a circle is a straight line drawn through the center and terminated both ways by... | |
 | Elias Loomis - Conic sections - 1858 - 256 pages
...a point within, called the center. This bounding line is called the circumference of the circle. 2. A radius of a circle is a straight line drawn from the center to the circumference. A diameter of a circle is a straight line passing through the center, and terminated both ways by the... | |
 | William E. Bell - Bridge building - 1857 - 250 pages
...a point within, called the centre. 35. The circle is the surface bounded by the circumference. 36. A radius of a circle is a straight line drawn from the centre to the circumference. (The term radius is a Latin word, the plural of which it ruilii. Thus,... | |
 | William E. Bell - Bridges - 1859 - 226 pages
...a point within, called the centre. 35. The circle is the surface bounded by the circumference. 36. A radius of a circle is a straight line drawn from the centre to the circumference. (The term radius is a Latin word, the plural of which is radii. Thus,... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 424 pages
...circle is a straight line drawn through the centre, and terminated both ways by the circumference. [A radius of a circle is a straight line drawn from the centre to the circumference.] 18. A semicircle is the figure contained by a diameter and the part of... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...circle is a straight line drawn through the centre, and terminated both ways by the circumference. [A radius of a circle is a straight line drawn from the centre to the circumference.] 18. A semicircle is the figure contained by a diameter and the part of... | |
 | Isaac Todhunter - Measurement - 1869 - 312 pages
...point within the figure to the circumference are equal to one another: this point is called the centre of the circle. A radius of a circle is a straight line drawn from the centre to the circumference. A diameter of a circle is a straight lino drawn through the centre and... | |
| |
A radius of a circle is a straight line drawn from the centre to the circumference. 
