Python Program to find the Area of Triangle

Summary:

This is a basic maths question which is easy to solve using a pen and paper. It is very easy to write a Python program to find the area of a triangle in an optimized way.

Python Program: Area of a triangle using the Math module

Math module is one of the most important parts of Python for mathematical operations.

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import math
a = 5.0
b = 6.0
c = 7.0
#Uncomment below line to take user Input
#a,b,c = map(float, input("Enter three sides separated by space\n").split(" "))

s = (a+b+c)/2

areaOfTrangle = math.sqrt(s*(s-a)*(s-b)*(s-c))
print("Area of triangle is {0:.2f}".format(areaOfTrangle))

Output

Area of triangle is 14.70

The logic of the program is simple. We used Heron’s formula to calculate the area of a triangle whose three sides are given.

Heron’s formula:

Find the perimeter using the formula s = (a+b+c)/2.

Find the area of a triangle using the formula √(s_(s-a)_(s-b)*(s-c)).

At line 10 of Python code, we calculate the area of a triangle using the formula as described above.

The last line is to print the resulted area of a triangle with two-digit precision {0:.2f}.

Python Code: Area of triangle without Math module

There are several ways to calculate square root in Python. We can calculate the area of a triangle in Python without using any module.

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areaOfTrangle = (s*(s-a)*(s-b)*(s-c))**0.5

This is another way to calculate the area of a triangle in Python after calculating the perimeter.