Which of the following is the equation of a circle whose center is at the origin and whose radius is 4?

A. x2 + y2 = 2

B. x2 + y2 = 4

C. x2 + y2 = 16

Question

21 July, 16:28

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Answers (1)

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Jose Browning · Answer 1

(x-h) ^2 + (y-k) ^2=r^2

center is (h, k)

radius is r

given

(0,0) = center

radius=4

(x-0) ^2 + (y-0) ^2=4^2

x^2+y^2=16

C

Which of the following is the equation of a circle whose center is at the origin and whose radius is 4?A. x2 + y2 = 2B. x2 + y2 = 4C. x2 + y2 = 16