Programming Example
Python program to find the area of a triangle
Python program to find the area of a triangle.
Mathematical formula:
Here is the semi-perimeter and a, b and c are three sides of the triangle. Let's understand the following 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) Enter first side: 5
Enter second side: 6
Enter third side: 7
The area of the triangle is 14.70
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.
Note - %0.2f floating-point specifies at least 0 wide and 2 numbers after the decimal. If you use %0.5f, then it will give 5 numbers after the decimal.
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.