Python program to find the area of a triangle

Mathematical formula:

Area of a triangle = (s*(s-a)*(s-b)*(s-c))-1/2

Here is the semi-perimeter and a, b and c are three sides of the triangle. Let's understand the following example.

See this example:

# Three sides of the triangle is a, b and c:
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 -

We take the input as three sides of a triangle and store them in three variables a, b, and c. Then, we have calculated the semi-perimeter of the triangle and put this value in the triangle's area formula.