C Program to Find Third Angle of a Triangle

C program to find the third angle of a triangle; Through this tutorial, we will learn how to find the third angle of a triangle if two angles are given in c programs.

Programs and Algorithm to Find Third Angle of a Triangle

To find the third angle of a triangle if two angles are given in c programs:

• Algorithm to find third angle of a triangle
• C Program to Find Third Angle of a Triangle

Algorithm to find third angle of a triangle

Use the following algorithm to write a program to find the third angle of a triangle if two angles are given; as follows:

1. Input two angles of triangle from user and store it in some variables.
2. Compute third angle of triangle using formula c = 180 - (a + b).
3. Print value of third angle i.e. print c.

C Program to Find Third Angle of a Triangle

/*
 * Given two angles of a triangle, Here is the
 * C program to find third angle
 */

#include <stdio.h>
#define ANGLE_SUM 180

int main() {
 /* Three angles of a triangle */
    float a1, a2, a3;

    /*
     * Take two angles as input from user
     */
    printf("Enter Two Angles of a Triangle :- ");
    scanf("%f %f", &a1, &a2);

    /* Sum of all three angles of a triangle is 180 degrees */
    a3 = ANGLE_SUM - (a1 + a2);

    printf("Third Angle = %0.4f", a3);

    return 0;
}

The output of the above c program; as follows:

Enter Two Angles of a Triangle :- 60 30
Third Angle = 90.0000

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