14 lines
215 B
C
14 lines
215 B
C
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#include<stdio.h>
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#include<math.h>
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int main()
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{
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float a,b,c,area,s;
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scanf("%f %f %f",&a,&b,&c);
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s = (a + b + c) / 2;
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area = sqrt(s * (s - a) * (s - b) * (s-c));
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printf("area = %.2f",area);
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return 0;
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}
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