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C. S. F. Crofton was born in 1873.
C. S. F. Crofton died in 1909.
F. S. C. Northrop was born in 1893.
F. S. C. Northrop died in 1992.
#include<stdio.h>
#include<math.h>
main()
{
float A,a,b,c,s;
printf("entr the value of a,b and c");
scanf("%f %f %f",&a,&b,&c);
A=sqrt(s*s-a*s-b*s-c)
printf("area of the triangle %f\n"A);
getch();
}