C Programming Code Examples C > Mathematics Code Examples C Program to Find Area of Scalene Triangle C Program to Find Area of Scalene Triangle Properties of Scalene Triangle : Scalene Triangle does not have sides having equal length. No angles of Scalene Triangle are equal. To calculate area we need at least two sides and the angle included by them. #include<stdio.h> #include<math.h> int main() { int side1, side2, angle; float area; printf("\nEnter Side1 : "); scanf("%d", &side1); printf("\nEnter Side2 : "); scanf("%d", &side2); printf("\nEnter included angle : "); scanf("%d", &angle); area = (side1 * side2 * sin((M_PI / 180) * angle)) / 2; printf("\nArea of Scalene Triangle : %f", area); return (0); }