SOLUTION: find the area and circumference of a circle with a center at (1,2) and passes through the point (7,10). Show on graph paper

Algebra ->  Circles -> SOLUTION: find the area and circumference of a circle with a center at (1,2) and passes through the point (7,10). Show on graph paper      Log On


   



Question 751985: find the area and circumference of a circle with a center at (1,2) and passes through the point (7,10). Show on graph paper
Found 2 solutions by richwmiller, tommyt3rd:
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
get your graph paper and compass or pen with string.
Put a pin on 1,2 and wrap the string on it and stretch the string to 7,10 and now draw your circle.

Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
We need the radius for both calculations. The radius can be found using the center and any point on the edge.

%0D%0Ad=sqrt%28%28x%5B2%5D-x%5B1%5D%29%5E2%2B%28y%5B2%5D-y%5B1%5D%29%5E2%29%0D%0A
%0D%0Ad=sqrt%28%287-1%29%5E2%2B%2810-2%29%5E2%29=10%0D%0A


%0D%0AA%5Bcircle%5D=pi%2Ar%5E2%0D%0A
%0D%0AA%5Bcircle%5D=pi%2A10%5E2=314%0D%0A
%0D%0AC=2Pi%2Ar=628%0D%0A




:)