#include <stdio.h>
#include <math.h>
int main() {
int s1, s2, angle;
float area;
printf("\nEnter Side1 : ");
scanf("%d", &s1);
printf("\nEnter Side2 : ");
scanf("%d", &s2);
printf("\nEnter included angle : ");
scanf("%d", &angle);
area = (s1 * s2 * sin((M_PI / 180) * angle)) / 2;
printf("\nArea of Scalene Triangle : %f", area);
return (0);
}
Enter Side1 : 3
Enter Side2 : 4
Enter included angle : 30
Area of Scalene Triangle : 3.000000
• 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.
Part 1 : M_PI
sin((M_PI/180)*angle)
• It is Constant defined in math.h Header File
• It contain value = 3.14 in short instead of writing 3.14 write directly M_PI.
Part 2 : ( M_PI / 180 ) * angle
• We are accepting angle in degree.
• C function sin takes argument in radian , so to convert angle into radian we are purposefully writing above statement.
Part 3 : sin function
• It computes sine of an angle