Question

14. Write a c program to input angles of a triangle and check whether triangle is valid or not.

Answer 1

Answer:

Explanation:

Evaluate 2 conditions :-

1) Sum of all angles should be 180 degress.

2) None of angles should be 0 degress.

#include <stdio.h>

int main()

{

   int angleA, angleB, angleC, sum;

   /* Take the input of  3 angles of triangle */

   printf("Enter 3 angles in degrees : ");

   scanf("%d%d%d", &angleA, &angleB, &angleC);

   sum = angleA + angleB + angleC;  

 

   if(angleA != 0 && angleB != 0 && angleC != 0 && sum == 180)  

   {

       printf("Triangle is valid with angles provided.");

   }

   else

   {

       printf("Triangle is not valid with angles provided.");

   }

   return 0;

}

Answer 2

Find sum of all three angles, store sum in some variable say sum = angle1 + angle2 + angle3 . Check if(sum == 180) then, triangle can be formed otherwise not. In addition, make sure angles are greater than 0 i.e. check condition for angles if(angle1 > 0 && angle2 > 0 && angle3 > 0) .