Question

Write the equation for the circle with center at (6,0) and radius of 6.

A. (x - 6) 2 + y 2 = 36
B. (x + 6) 2 + y 2 = 36
C. (x - 6) 2 - y 2 = 36

Answer 1

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General Equation of a circle with centre (a, b) and radius r
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(x − a)² + (y − b)² = r²

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Substitute (6,0) and r = 6
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(x - 6)² + (y - 0)² = 6²
(x - 6)² + y² = 36

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Answer: (x - 6)² + y² = 36 (Answer A)
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