 | John Lathrop - Astronomy - 1821 - 206 pages
...straight lines proceeding from the centre to the circumference of a circle, are equal. 6. A right or straight line drawn from the centre of a circle to its circumference, is called radius, or semi-diameter. 7. Every straight line, drawn through the centre of a circle, and terminated... | |
 | Frederick Collier Bakewell - Physics - 1833 - 268 pages
...rays will be refracted nearer to the perpendicular of the surface, as before explained to you.* The line drawn from the centre of a circle to its circumference is, as you are aware, perpendicular to that point through which it is drawn ; therefore the line c I will... | |
 | Dionysius Lardner - Geometry - 1838 - 382 pages
...(18) XVI. This point (from which the equal lines are drawn) is called the centre of the circle. (19) A line drawn from the centre of a circle to its circumference is called a radius. (20) XVII. A diameter of a circle is a right line drawn through the centre, terminated both ways in... | |
 | Mrs. Lincoln Phelps, Phelps (Mrs) - Physics - 1840 - 234 pages
...half of a semicircle, or the fourth part of a circle. R. Radiation. An emission of rays. Radius. Is a straight line drawn from the centre of a circle to its circumference. The plural of radius is radii. Radii of the same circle are equal to one another. Rainbow. An appearance... | |
 | George Roberts Perkins - Geometry - 1847 - 326 pages
...circumference, are equal to one another. This point is called the centre of the circle. One of the equal lines drawn from the centre of a circle to its circumference, is called a radius. The line passing through the centre, and terminating each way in the circumference, is called a diameter.... | |
 | George Roberts Perkins - Geometry - 1850 - 332 pages
...circumference, are equal to one another. This point is called the centre of the circle. One of the equal lines drawn from the centre of a circle to its circumference, is called a radius. The line passing through the centre, and terminating each way in the circumference, is called a diameter.... | |
 | 1851 - 716 pages
...equal parts, which are called degrees ; each degree contains 60 minutes, and each minute 60 seconds. A straight line, drawn from the centre of a circle to its circumference, is called a semidiameter or radius, eg cd (fig. 40) ; a straight line uniting two points of the circumference,... | |
 | Johann Georg Heck - Encyclopedias and dictionaries - 1851 - 712 pages
...equal parts, which are called degrees ; each degree contains 60 minutes, arid each minute 60 seconds. A straight line, drawn from the centre of a circle to its circumference, is called a semidiameter or radius, eg cd (fig. 40) ; a straight line uniting two points of the circumference,... | |
 | Thomas Hill - Geometry - 1855 - 152 pages
...straight line on the floor, 5* 54 GEOMETRY. place is always there whether it is marked or not. & 7. A straight line drawn from the centre of a circle to its circumference is called a radius. All the radii of the same circle are equal. In this figure there are three radii marked by black lines.... | |
 | Johann Georg Heck - Encyclopedias and dictionaries - 1860 - 332 pages
...equal parts, which are called degrees ; each degree contains 60 minutes, and each minute 60 seconds. A straight line, drawn from the centre of a circle to its circumference, is called a semidiameter or radius, eg cd (fig. 40) ; a straight line uniting two points of the circumference,... | |
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... is throughout the entire length a square whose side is 7 ft. How many cubic feet of brick does the chimney contain ? A Sphere is a solid bounded by a curved surface all points of which are equally distant from a point within called the centre. A straight... 
