2007-01-24 17:11:58 · 5 answers · asked by Yanna F 1 in Science & Mathematics ➔ Mathematics
The standard equation of a circle with center C(h,k) and radius r is:
(x - h)^2 + (y - k)^2 = r^2
2007-01-24 17:17:02 · answer #1 · answered by Anonymous · 2⤊ 1⤋
Apart from the answer given by "matahari" which is classically the equation of a circle, three are other equations that lead to the area (pi x r^2) and the circumference (2 x pi x r) of a circle.
pi = 3.142 (approximately), r is the radius of the circle.
2007-01-25 01:27:44 · answer #2 · answered by Anonymous · 0⤊ 0⤋
(x - h)^2 + (y - k)^2 = r^2
whereas (h,k) is the center, (x,y) is a point that lies on the circle, and "r" is the radius
2007-01-25 02:19:54 · answer #3 · answered by Sherman81 6 · 0⤊ 0⤋
x^2+y^2+2gx+2fy+c=0
center(-g,-f) r= square root of (g^2+f^2-c)
other form has been given above
2007-01-25 01:24:26 · answer #4 · answered by tarundeep300 3 · 0⤊ 0⤋
FOR YOUR INFORMATION,
CIRCUMFERENCE/DIAMETER=PAI
2007-01-25 01:46:18 · answer #5 · answered by john c 1 · 0⤊ 2⤋