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

**Table of Contents**show

## 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.

You may like, Python program to find an area of a rectangle.

## 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.

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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

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