**Write a C program to find the area of a Triangle using Hero’s Formula.**

/** Program to Find Area of a Triangle using Hero’s Formula **/

#include <stdio.h>

#include <math.h>

main()

{

float a, b, c, s, area;

back:

printf(“\nEnter three sides of a triangle: “);

scanf(“%f %f %f”, &a, &b, &c);

if (a==0 || b==0 || c==0)

{

printf(“\nValue of any side should not be equal to

zero\n”);

goto back;

}

if (a+b<c || b+c<a || c+a<b)

{

printf(“\nSum of two sides should not be less than

third\n”);

goto back;

}

s = (a + b + c) / 2;

area = sqrt(s * (s – a) * (s – b) * (s – c));

printf(“\n\nArea of triangle: %.2f”, area);

getch();

}

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