A. middle, dimeter
B. outer edge, diagonal
C. center, radius
D. hyperbola, chord
2007-06-15 04:07:41 · 7 answers · asked by Lizza C 1 in Science & Mathematics ➔ Mathematics
C. center, radius
The general equation for a circle with center (h, k) and radius "r" is:
(x - h)^2 + (x - k)^2 = r^2
So, all you need to know are the center and radius. For example, if you have a circle with center at (4, -3) and radius of 5, you would have:
(x - 4)^2 + (x + 3)^2 = 25
2007-06-15 04:10:51 · answer #1 · answered by C-Wryte 3 · 0⤊ 0⤋
The answer is C cuz in order to write the equation of a circle you need to know where the center is located and how big is it which is the radius.
2007-06-15 11:18:14 · answer #2 · answered by ABC911 1 · 0⤊ 0⤋
Standard form of circle
(x-a)^2 + (y-b)^2 = r^2
a and b = 0 if the circle is at the origin.
r is half the diameter
2007-06-15 11:12:20 · answer #3 · answered by ≈ nohglf 7 · 0⤊ 0⤋
center and radius
(x,y) and r
where x^2+y^2=r^2
2007-06-15 11:15:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
either A or C will give you the information you need, but C has the information in a more convenient form.
2007-06-15 11:11:45 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Silly question (c) is the right answer.
I Bet i know everything about coordinate geometry. Dont ask these childish questions.
2007-06-15 11:47:14 · answer #6 · answered by Vikas 3 · 0⤊ 1⤋
c
2007-06-15 11:11:22 · answer #7 · answered by !!!!!DR.???? 1 · 0⤊ 0⤋