Python Program to Calculate the Area of a Triangle

A triangle is a closed-shaped two-dimensional polygon having three sides and three corners. The corners are called vertices and the sides are called edges. In this article, we will see how we can calculate the area of a triangle in Python.

Example:

Input: 5 6 7
Output: Area = 14.70

Program to Calculate the Area of a Triangle in Python

Below are some of the examples by which we can understand how we can calculate the area of a triangle in Python:

Area of a Triangle in Python Using Heron’s Formula

In this example, we define a function for calculating the area of triangle at first where we use the formula and return the answer. In the driver function we pass the values as sides of triangle and call the function for calculating the area.

Heron’s Formula

Area of Triangle = (s(s-a)*(s-b)*(s-c) )** 0.5
s = a + b + c/2

Python3

def areaTriangle(a, b, c):
    s = (a+b+c)/2
    return (s*(s-a)*(s-b)*(s-c))**0.5

a = 7
b = 8
c = 9
print('Area = {:.2f}'.format(areaTriangle(a, b, c)))

Output

Area = 26.83

Area of a Right-Angled Triangle in Python

In this example, we calculate the area of a right angled triangle whose base and height is given. At first, we define a function to calculate the area where we write the formula to calculate the area and then return the answer. In the driver function we pass the values of base and height of triangle.

Formula

Area of Triangle: 1/2 * b * h

Python3

def areaTriangle(b, h):
    return 0.5 * b * h

base = 8
height = 9
print('Area = {:.2f}' .format(areaTriangle(base, height)))

Output

Area = 36.00