SOLUTION: The directions for the question is "Write an equation for the circle that satisfies each set of conditions." But the actual question is, "center (8,-9), passes through (21,22)

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: The directions for the question is "Write an equation for the circle that satisfies each set of conditions." But the actual question is, "center (8,-9), passes through (21,22)      Log On


   

Question 853690: The directions for the question is "Write an equation for the circle that satisfies each set of conditions."

But the actual question is, "center (8,-9), passes through (21,22)." I have no clue what to do or where to start please help...
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
CLUE: A circle is the set of points equally distant from a specific point. The radius is the distance between any point on the circle and the center.

STRATEGY: Use the distance formula to find the value for the radius. Build the equation of your circle into the standard form equation for a circle.

KNOWLEDGE: Standard Form Equation for a circle is %28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2, and the center is (h,k); and the radius is r.
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Distance Formula: sqrt%28%28x-u%29%5E2%2B%28y-v%29%5E2%29 between points (x,y) and (u,v).