How To Find Area Of A Triangle In Python

In this python tutorial, you will learn about how to find area of a triangle in Python, the Python program to find the area of a triangle and, also we will check:

Python program to find the area of a triangle
Python program to calculate the area of a triangle using function
Python program to find the area of a triangle given all three sides
Python program to find the area of a triangle using class
Python program to find the area of a triangle when base and height are given
Python program to find the area of a triangle using function when base and height are given

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Python program to find the area of a triangle

Let see python program to find the area of a triangle.

In this example, we will ask the user to enter the length of three sides of a triangle.
We will use Heron’s formula to calculate the semi-perimeter.
And Area = (s*(s-a)*(s-b)*(s-c)) ** 0.5 to calculate the area of the triangle.
At last, print the area of the triangle to get the output.

Example:

a = float(input('Enter the length of first side: '))  
b = float(input('Enter  the length of second side: '))  
c = float(input('Enter  the length of third side: '))  
s = (a + b + c) / 2  
Area = (s*(s-a)*(s-b)*(s-c)) ** 0.5  
print('The area of the triangle is %0.2f' %Area)

You can refer to the below screenshot to see the output for the python program to find the area of a triangle.

The above code we can use to find area of a triangle in Python.

Also, read, Python program to find the area of square.

Python program to calculate area of a triangle using function

Now, we will see python program to calculate the area of a triangle using function.

Firstly, we will import math module which will allow us to use the mathematical function like math.sqrt function.
Now, we will define the function with three arguments using the def keyword as def Areaoftriangle(a, b, c).
We will use Heron’s formula to calculate the semi-perimeter.
And Area = math.sqrt((s*(s-a)*(s-b)*(s-c)))to calculate the area of the triangle.
The user will enter the three sides of the triangle a,b,c and we will pass those values to function arguments to calculate the area.
At last, print is used to get the output.

Example:

import math
def Areaoftriangle(a, b, c):
    Perimeter = a + b + c
    s = (a + b + c) / 2
    Area = math.sqrt((s*(s-a)*(s-b)*(s-c)))
    print("The perimeter of traiangle = %.2f" %Perimeter);
    print("The Semi Perimeter of traiangle = %.2f" %s);
    print("The Area of a triangle is %0.2f" %Area)
Areaoftriangle(8, 9, 10)

You can refer to the below screenshot to see the output for python program to calculate the area of a triangle using function.

The above code, we can use to calculate area of a triangle using function in Python.

Python program to find area of a triangle given all three sides

Here, we will see python program to find the area of a triangle given all three sides

Firstly, we will import math module which will allow us to use the mathematical function like math.sqrt function.
We will ask the user to enter the length of three sides of a triangle and it will be stored in a separate variable.
We will use Heron’s formula for calculating the semi-perimeter which is s=(a+b+c)/2.
And Area = math.sqrt(s*(s-a)*(s-b)*(s-c)) to calculate the area of the triangle.
At last, print the area of the triangle to get the output.

Example:

import math
a=int(input("Enter the length of first side: "))
b=int(input("Enter the length of second side: "))
c=int(input("Enter the length of third side: "))
s=(a+b+c)/2
Area=math.sqrt(s*(s-a)*(s-b)*(s-c))
print("Area of the triangle is: ",round(Area,2))

You can refer to the below screenshot to see the output for the python program to find the area of a triangle given all three sides.

This is the python program to find area of a triangle given all three sides.

Check out, How to calculate area of a circle in Python?

Python program to find area of a triangle using class

Let’s see python program to find the area of a triangle using class

We will create a class called class sides.
Another class called class A(sides) it has a method called def area(self) return (s*(s-self.a)*(s-self.b)*(s-self.c)) ** 0.5 which is the area of the class.
An object for the class is created as obj = A(10,12,14).
By using the object, the method area() is called.
At last, print the area of a rectangle to see the output.

Example:

class sides:
    def __init__(self,a, b, c):
        self.a = a
        self.b = b
        self.c = c
class A(sides):
    def area(self):
        s = (self.a + self.b + self.c)/2
        return (s*(s-self.a)*(s-self.b)*(s-self.c)) ** 0.5
obj = A(10,12,14)
print("Area of triangle : {}".format(obj.area()))

You can refer to the below screenshot to see the output for the python program to find the area of a triangle using class.

Also, read, How to calculate simple interest in Python?

Python program to find area of a triangle when base and height are given

Now, we will see python program to find the area of a triangle when base and height are given

In this example, we will ask the user to enter the base and height of a triangle.
To calculate the area of a triangle we will use the formula Area = (b * h)/2.
At last, print the area of the triangle to get the output.

Example:

b = float(input('Enter the base of a triangle: '))  
h = float(input('Enter the height of a triangle: '))  
Area = (b * h)/2
print('The area of the triangle is %0.2f' %Area)

You can refer to the below screenshot to see the output for the python program to find the area of a triangle when base and height are given.

Read: PdfFileReader Python example

Python program to find area of a triangle using function when base and height are given

Here, we will see a python program to find the area of a triangle using function when base and height are given

In this example, we will define the function as def Area(base, height).
Here, Area(10, 15) is the value passed to the function argument.
At last, it will return the area of the triangle and print the output.

Example:

def Area(base, height):
   return 0.5 * base * height
print(Area(10, 15))

You can refer to the below screenshot to see the output for the python program to find the area of a triangle using function when base and height are given.

Python program to find the area of a triangle using function when base and height are given

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In this Python tutorial, we have learned about the Python program to find the area of a triangle. Also, we covered these below topics:

Python program to find the area of a triangle
Python program to calculate the area of a triangle using function
Python program to find the area of a triangle given all three sides
Python program to find the area of a triangle using class
Python program to find the area of a triangle when base and height are given
Python program to find the area of a triangle using function when base and height are given

Bijay Kumar

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