Write a program to find the area of triangle by sides (Heron's Formula)

 

 GTU PPS Practical-2

Logic :

Logic of this program is very simple as everyone knows the basic mathematics to find area of triangle.

Let us quickly recall the formula of the area of a triangle.

Area of triangle (A) = [s(s-a)(s-b)(s-c)]^½

You can also check this : find the area of triangle using the formula A = 0.5 * height * base.

In this program, we have to take the length of sides of a triangle from the user then calculate s = (a+b+c)/2 and then we can calculate the area of triangle.

Here, we have to use math.h library to take square root.

Let's look at the algorithm.

Algorithm :

1. START
2. Input sides a, b, c of triangle.
3. Compute s = (a+b+c)/2.
4. Compute ar = s*(s-a)*(s-b)*(s-c) .
5. Take area = square root of ar .
6. print area.
7. STOP

Code :

#include <stdio.h>
#include <math.h>
int main()
{
    float a,b,c,s,area;
    printf("Enter the length of side a:");
    scanf("%f", &a);
 
    printf("Enter the length of side b:");
    scanf("%f", &b);
 
    printf("Enter the length of side c:");
    scanf("%f", &c);
    s = (a+b+c)/2 ;
 
    area = s*(s-a)*(s-b)*(s-c) ;
    printf("The area of given triangle is %.2f", sqrt(area));
    return 0;
}

Output :

Here you can see output screen of the code.You can get this type of output if you write above code.

Also check

Find the area of triangle using the formula A = 0.5 * height * base.

THANK YOU