### Source Code:

# Python Program to find the area of triangle # Three sides of the triangle a, b and c are provided by the user a = float(input('Enter first side: ')) b = float(input('Enter second side: ')) c = float(input('Enter third side: ')) # calculate the semi-perimeter s = (a + b + c) / 2 # calculate the area area = (s*(s-a)*(s-b)*(s-c)) ** 0.5 print('The area of the triangle is %0.2f' %area)

### Output:

Enter first side: 5 Enter second side: 6 Enter third side: 7 The area of the triangle is 14.70

### Explanation

In this program, we asked users to enter the length of three sides of a triangle. We used the Heron’s Formula to calculate the semi-perimeter and hence the area of the triangle.