Find the third angle of a triangle

Posted on Apr 4, 2020

C program to find the third angle of a triangle if two angles are given.

Program 

#include<stdio.h>
#include<conio.h>
void main()
{
    int angle1, angle2, angle3;

    printf("Enter two angles of triangle: ");
    scanf("%d %d", &angle1, &angle2);

   	angle3 = 180 - (angle1 + angle2);

   	printf("\nThird angle of the triangle is:  %d", angle3);

	getch();
}

Output 

Enter two angles of triangle: 30
40

Third angle of the triangle is:  110

Explanation

In this program, value of two angles is taken as an input from the user and stored in the variables named 'angle1' and 'angle2' respectively. As we all know, sum of all angles in a triangle is 180 degree.
i.e. angle1 + angle2 + angle3 = 180
So, We have the values of two angles and third angle can be calculated using the formula
angle3 = 180 - (angle1 + angle2)