A circle is centered at (5,-9) and has a radius of 12. Which of the following is the equation for this circle?
2 answers:
Answer:
(x - 5)^2 + (y + 9)^2 = 144. is correct
Step-by-step explanation:
Answer:
b.
Step-by-step explanation:
The general form for a circle is:
(x - a)^2 + (y - b)^2 = r^2
where (a, b) is the centre and r = the radius.
So here (a, b) = (5, -9) and r = 12 giving:
(x - 5)^2 + (y - (-9))^2 = 12^2
(x - 5)^2 + (y + 9)^2 = 144.
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