Thursday, May 23, 2013

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

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 

 


:)
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