Python Program to Find Area of Triangle

Python program to find area of triangle; Through tutorial, i am going to show you how to find or calculate area of triangle in python using function.

The area of a polygon is the number of square units inside that polygon. A triangle is a three-sided polygon. We will look at several types of triangles in this lesson. To find the area of a triangle, multiply the base by the height, and then divide by 2.

In this tutorial, i will write a python programs to calculate or find area of triangle using coordinates and function.

Python Program to Find or Calculate Area of Triangle

  • Find Area of Triangle Formula
  • Python program to find area of triangle using coordinates
  • Python Program to Find the Area of a Triangle using Function

Find Area of Triangle Formula

First of all, you must know the length of three sides of a triangle. So you can calculate the area of a triangle using Heron’s Formula, which is given below:

Area of a Triangle = √(s*(s-a)*(s-b)*(s-c))

Where s = (a + b + c )/ 2 (Here s = semi perimeter and a, b, c are the three sides of a triangle)

Perimeter of a Triangle = a + b + c

Python program to find area of triangle using coordinates

See the following steps to calculate area of triangle in python:

  • Allow the user to input the triangle sides.
  • Calculate the Perimeter of Triangle using the formula P = a+b+c.
  • Calculating the semi perimeter using the formula (a+b+c)/2.
  • Calculating the Area of a triangle using Heron’s Formula: (s*(s-a)*(s-b)*(s-c)) ** 0.5.
  • Print the Area of a triangle.
# Python Program to find Area of a Triangle
a = float(input('Please Enter the First side of a Triangle: '))
b = float(input('Please Enter the Second side of b Triangle: '))
c = float(input('Please Enter the Third side of c Triangle: '))
# calculate the Perimeter
Perimeter = a + b + c
# calculate the semi-perimeter
s = (a + b + c) / 2
# calculate the area
Area = (s*(s-a)*(s-b)*(s-c)) ** 0.5
print("\n The Perimeter of Traiangle = %.2f" %Perimeter);
print(" The Semi Perimeter of Traiangle = %.2f" %s);
print(" The Area of a Triangle is %0.2f" %Area)

After executing the python program, the output will be:

Please Enter the First side of a Triangle:  5
Please Enter the Second side of b Triangle:  4
Please Enter the Third side of c Triangle:  3

 The Perimeter of Traiangle = 12.00
 The Semi Perimeter of Traiangle = 6.00
 The Area of a Triangle is 6.00

Python Program to Find the Area of a Triangle using Function

Use the following steps to create python program to calculate area of triangle using function

  • Import math module.
  • Defined the function with three arguments using def keyword.
  • Calculate the perimeter and Area of a triangle inside functions using math.sqrt() and with Heron’s Formula.
  • Allow the User to input the sides of triangle.
  • Print the Perimeter and Area of a triangle.
# Python Program to find Area of a Triangle using Functions
import math
def AreaOfTriangle(a, b, c):
    
    # calculate the Perimeter
    Perimeter = a + b + c
    
    # calculate the semi-perimeter
    s = (a + b + c) / 2
    # calculate the area
    Area = math.sqrt((s*(s-a)*(s-b)*(s-c)))
    print("\n The Perimeter of Traiangle = %.2f" %Perimeter);
    print(" The Semi Perimeter of Traiangle = %.2f" %s);
    print(" The Area of a Triangle is %0.2f" %Area)
    
a = float(input('Please Enter the First side of a Triangle: '))
b = float(input('Please Enter the Second side of b Triangle: '))
c = float(input('Please Enter the Third side of c Triangle: '))
AreaOfTriangle(a, b, c)

After executing the python program, the output will be:

Please Enter the First side of a Triangle:  10
Please Enter the Second side of b Triangle:  15
Please Enter the Third side of c Triangle:  20

 The Perimeter of Traiangle = 45.00
 The Semi Perimeter of Traiangle = 22.50
 The Area of a Triangle is 72.62

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