## C Program to Calculate Area of Scalene Triangle

## C Program to Find Area of Scalene Triangle :

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #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); } |

## Output :

1 2 3 4 | Enter Side1 : 3 Enter Side2 : 4 Enter included angle : 30 Area of Scalene Triangle : 3.000000 |

## C Program for Beginners : 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.

## Formula to Find Area of Scalene Triangle :

## Explanation and Program Logic :

### Part 1 : M_PI

1 | 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