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SAT Math· difficulty 2/5

What is the radius of the circle with equation (x−2)2+(y−7)2=49(x-2)^2 + (y-7)^2 = 49?

  • A

    7

    check_circle
  • B

    14

  • C

    49

  • D

    7\sqrt{7}

Explanation

In standard form (x−h)2+(y−k)2=r2(x-h)^2 + (y-k)^2 = r^2, we have r2=49r^2 = 49, so r=7r = 7.

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