Python ProgrammingPython Programming

Calculate Area of a Triangle

Develop a program that reads the lengths (L1, L2 and L3 be the lengths) of the sides of a triangle from the user and displays its area. Use inbuilt sqrt function from math module.
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#Python's program to calculate the area of Triangle.
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from math import sqrt

#Read the inputs from user
l1	= float(input("Enter the length (L1) of Triangle: "))
l2	= float(input("Enter the length (L2) of Triangle: "))
l3	= float(input("Enter the length (L3) of Triangle: "))

#Calculate the area
length = (l1+l2+l3)/2
total = (length * (length-l1) * (length-l2) * (length-l3))
area = sqrt(total)

#Display the result
print("The area of Trianle is: ",round(area,2))
Sample output of above program.
C:\Python\programs>python program.py
Enter the length (L1) of Triangle: 15
Enter the length (L2) of Triangle: 26
Enter the length (L3) of Triangle: 24
The area of Trianle is: 177.27

C:\Python\programs>