Friday, May 17, 2013

Find, to the nearest square yard, the area of a triangular plot of ground that measures 15 yards by 20 yards by 25 yards.

We use Heron's formula: 
%0D%0AA=sqrt%28s%28s-a%29%28s-b%29%28s-c%29%29%0D%0A 


where 


%0D%0As=%28a%2Bb%2Bc%29%2F2%0D%0A 
Now a=15, b=20, c=25 



%0D%0As=%28a%2Bb%2Bc%29%2F2=%2815%2B20%2B25%29%2F2=30%0D%0A 



 



:)
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