Basic C Program to find area of triangle

    In this C program we will see how to find the Area of triangle using formula:

Area = √ s (s-a) (s-b) (s-c) , here s = semi-perimeter = a+b+c /2 and a, b, c are sides of triangle.

 

• LOGIC: 

 First we'll calculate semi-perimeter and then we'll find area using the formula. Since formula of area have square root, so we'll include  <math.h>  file in our program.

 

• ALGORITHM:

1. Start
2. Input three sides of triangle: a, b, c.
3. Calculate semi-perimeter, s = a+b+c /2
4. Calculate area of triangle, area = √s (s-a) (s-b) (s-c)
5. Print the area of triangle
6. End

• CODE:

#include <stdio.h>

#include <math.h>

int main ()

{

    /*declare variables for 3 sides,

    semi-perimeter and area.*/

    float a,b,c,s,area;

    printf("Enter sides of triangle : ");

    //input values of 3 sides from user.

    scanf("%f %f %f",&a,&b,&c);

    //calculate semi-perimeter

    s=(a+b+c)/2;

    //calculate area

    area=sqrt(s*(s-a)*(s-b)*(s-c));

    printf("Area of the triangle is : %.2f",area);

    return 0;

} 

•  OUTPUT:

Enter sides of triangle : 3 4 5
Area of the triangle is : 6.00

 

• CHALLENGE.1:

Try to make a program to find sum of roots and product of roots of a quadratic equation.

Solution to above Challenge.1

That's it for today. If you have any problem then don't hesitate to ask.

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