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28 January, 17:47

What is the diameter of the circle given by the equation (x + 7) 2 + (y + 2) 2 = 121?

A.

22

B.

33

C.

11

D.

5.5

+2
Answers (1)
  1. 28 January, 20:04
    0
    A.

    22

    Step-by-step explanation:

    The equation of the circle is written in the form

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

    So

    (x + 7) 2 + (y + 2) 2 = 11^2

    The radius is 11

    The diameter is twice the radius, so the diameter is 2*11 = 22
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