2007-03-05 00:12:47 · 8 answers · asked by poker king 1 in Science & Mathematics ➔ Geography
The radius of a circle is the distance from the center of a circle to any point on the circle. If you place two radii end-to-end in a circle, you would have the same length as one diameter. Thus, the diameter of a circle is twice as long as the radius. This relationship is expressed in the following formulad=2.r , where d is the diameter and r is the radius.
In classical geometry, a radius of a circle or sphere is any line segment from its center to its boundary. By extension, the radius of a circle or sphere is the length of any such segment. The radius is half the diameter. In science and engineering the term radius of curvature is commonly used as a synonym for radius.
More generally—in geometry, engineering, graph theory, and many other contexts—the radius of something (e.g., a cylinder, a polygon, a graph, or a mechanical part) is the distance from its center or axis of symmetry to its outermost points. In this case, the radius may be more than half the diameter.
The relationship between the radius and the circumference of a circle is r=c/2pie
To compute the radius of a circle going through three points P1,P2,P3, the following formula can be used:
r= [P1-P3]/2sin@(theeta)
The distance around a circle is called the circumference. The distance across a circle through the center is called the diameter. pie is the ratio of the circumference of a circle to the diameter. Thus, for any circle, if you divide the circumference by the diameter, you get a value close to pie . This relationship is expressed in the following formula:
C/D=pie
The circumference of a circle is the exact same distance from the middle of the circle all the way around.
2007-03-05 05:27:31 · answer #1 · answered by aaryan 2 · 0⤊ 0⤋
Radius is the distance from the center to the outside of the circle (half the diameter).
Circumference is the total distance around the circle.
2007-03-05 00:17:21 · answer #2 · answered by Maudie 6 · 0⤊ 0⤋
Radius: any strait line extending from the center of the periphery of a circle or sphere to the outer bounders.
Circumference: 1 the line bounding a circle, a rounded surface, or an area suggesting a circle 2 the distance measured by this line
Websters New World Dictionary
2007-03-05 00:33:20 · answer #3 · answered by roost2 3 · 0⤊ 0⤋
Circumference is the total perimeter of the circle. Diameter is the straight length of a semi-circle. The radius is half the diameter.
:)
2007-03-05 00:16:25 · answer #4 · answered by Anonymous · 0⤊ 0⤋
radius is the length from the middle to the edge, the circumference is the length if you took a rope and wrapped it around the sphere
2007-03-05 00:15:36 · answer #5 · answered by Anonymous · 1⤊ 1⤋
the fringe is the excellent length of the exterior fringe of an merchandise, and section is the excellent area coated. think of a sq.. in case you degree the lengths of the perimeters and further them jointly you will possibly get the fringe--the size of the exterior facet. Now fill that sq.. the gap in between the lines that gets filled up is the section. Take the size and multiply it by potential of the width and additionally you have the section, or complete area coated.
2016-10-17 07:40:12 · answer #6 · answered by ? 4 · 0⤊ 0⤋
the diffrence is the radius is only the point from the middle to the edge and the circomfrence is the all the way around the object.
2007-03-05 00:20:50 · answer #7 · answered by b m 1 · 0⤊ 0⤋
Your right Ally.
2007-03-05 00:16:24 · answer #8 · answered by lanisoderberg69 4 · 0⤊ 1⤋