Three angles of a Triangle are entered through the keyboard, write a C program to check whether the Triangle is valid or not. The Triangle is valid if the sum of all the angles is exactly equal to 180.
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Triangle Valid or Not based On Sides: C Program.
Logic To Find Valid Triangle or Not
We ask the user to enter all 3 angles of a Triangle. Then we add all these angles and if the result is 180 then its a valid Triangle, if not, its not a valid Triangle.
Formula To Calculate Valid Triangle
a + b + c = 180;
where a, b and c are 3 angles of a Triangle.
Note: Also not that if any of the angle is 0, then those 3 angles can’t form a Triangle, so it’s a invalid Triangle.
Triangle Valid or Not based On Angles: C Program
Triangle Valid or Not based On Angles: C Program
- #include < stdio.h >
- int main()
- {
- int a1, a2, a3, sum;
- printf("Enter 3 angles of a Triangle\n");
- scanf("%d%d%d", &a1, &a2, &a3);
- sum = a1 + a2 + a3;
- if(sum == 180 && a1 != 0 && a2 != 0 && a3 != 0)
- {
- printf("It's a valid Triangle\n");
- }
- else
- {
- printf("It's not a valid Triangle\n");
- }
- return 0;
- }
Output 1:
Enter 3 angles of a Triangle
90
80
0
It’s not a valid Triangle
Output 2:
Enter 3 angles of a Triangle
90
90
90
It’s not a valid Triangle
Output 3:
Enter 3 angles of a Triangle
90
80
10
It’s a valid Triangle
Output 3 outputs valid Triangle as addition of all 3 angles gives 180.
90 + 80 + 10 = 180.
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