🚀 Programming Example

Python program to find the area of a triangle

👁 199 Views

💻 Practical Program

📘 Step Learning

Python program to find the area of a triangle.

📌 Information & Algorithm

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.

💻 Program Code

# 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)

🖥 Program 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.

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.

🎯 How to learn from this example

First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.

🔥 Practice suggestion

Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.