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A circle in the 
xy-plane has its center at the point 
(-6,1). If the point 
(7,12) lies on the circle, what is the radius of the circle?
(Round the answer to the nearest integer.)

A circle in the xy x y -plane has its center at the point (6,1) (-6,1) . If the point (7,12) (7,12) lies on the circle, what is the radius of the circle?\newline(Round the answer to the nearest integer.)

Full solution

Q. A circle in the xy x y -plane has its center at the point (6,1) (-6,1) . If the point (7,12) (7,12) lies on the circle, what is the radius of the circle?\newline(Round the answer to the nearest integer.)
  1. Identify Center and Point: Identify the coordinates of the center of the circle and a point on the circle.\newlineThe center of the circle is at (6,1)(-6,1), and the point on the circle is (7,12)(7,12).
  2. Calculate Radius: Use the distance formula to calculate the radius of the circle.\newlineThe distance formula is d=(x2x1)2+(y2y1)2 d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} , where (x1,y1) (x_1, y_1) and (x2,y2) (x_2, y_2) are the coordinates of two points.
  3. Plug Coordinates into Formula: Plug the coordinates of the center and the point on the circle into the distance formula.\newlineUsing the center (6-6,11) and the point (77,1212), we get:\newliner=(7(6))2+(121)2 r = \sqrt{(7 - (-6))^2 + (12 - 1)^2} \newliner=(7+6)2+(121)2 r = \sqrt{(7 + 6)^2 + (12 - 1)^2} \newliner=132+112 r = \sqrt{13^2 + 11^2} \newliner=169+121 r = \sqrt{169 + 121} \newliner=290 r = \sqrt{290}
  4. Round to Nearest Integer: Round the result to the nearest integer.\newlineSince 290 \sqrt{290} is approximately 1717.0303, we round it to the nearest integer, which is 1717.

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