In the previous article, we have discussed Python Program to Compute x^n/n!

**Math Module :**

Python’s math module is a built-in module. By importing this module, we can perform mathematical computations.

Numerous mathematical operations like ceil( ),floor( ),factorial( ),mod( ),value of pi ,…..etc .can be computed with the help of math module.

**Hemisphere:**

The word hemisphere can be broken down into hemi and sphere, where hemi means half and sphere is a 3D geometric shape used in mathematics.

As a result, a hemisphere is a three-dimensional geometric shape that is half of a sphere, with one side flat and the other as a circular bowl.

**Formula to calculate the surface area of a Hemisphere:**

surface area =** 3𝛑r²**

In which, **r** is the radius of the hemisphere.

**Formula to calculate the volume of a**

**Hemisphere****:****(2/3)*𝛑*r3**

**Examples:**

**Example1:**

**Input:**

Given Hemisphere's Radius = 9

**Output:**

The Surface Area of the given Hemisphere with radius { 9 } = 763.02 The Volume of the given Hemisphere with radius { 9 } = 1526.04

**Example2:**

**Input:**

Given Hemisphere's Radius = 12.5

**Output:**

The Surface Area of the given Hemisphere with radius { 12.5 } = 1471.875 The Volume of the given Hemisphere with radius { 12.5 } = 4088.5416666666665

## Program to Calculate the Surface Area and Volume of a Hemisphere in Python

Below are the ways to Calculate the surface area and volume of a hemisphere with the given hemisphere’s radius :

### Method #1: Using Mathematical Formula (Static Input)

**Approach:**

- Import the math module using the import keyword.
- Give the hemisphere’s radius as static input and store it in a variable.
- Take a variable and initialize it with the value of pi as 3.14.
- Calculate the surface area of the given hemisphere using the above given mathematical formula and math.pow() function.
- Store it in another variable.
- Calculate the volume of the given hemisphere using the above given mathematical formula and math.pow() function.
- Store it in another variable.
- Print the hemisphere’s surface area with the given radius of the hemisphere.
- Print the hemisphere’s perimeter with the given radius of the hemisphere.
- The Exit of the program.

**Below is the implementation:**

# Import the math module using the import keyword. import math # Give the hemisphere's radius as static input and store it in a variable. gvn_radus = 9 # Take a variable and initialize it with the value of pi as 3.14 . valof_pi = 3.14 # Calculate the surface area of the given hemisphere using the above given mathematical # formula and math.pow() function. # Store it in another variable. hemi_surfceara = 3*valof_pi*math.pow(gvn_radus, 2) # Calculate the volume of the given hemisphere using the above given mathematical formula # and math.pow() function. # Store it in another variable. hemi_volum = (2.0/3.0)*valof_pi*math.pow(gvn_radus, 3) # Print the hemisphere's surface area with the given radius of the hemisphere. print("The Surface Area of the given Hemisphere with radius {", gvn_radus, " } = ", hemi_surfceara) # Print the hemisphere's perimeter with the given radius of the hemisphere. print("The Volume of the given Hemisphere with radius {", gvn_radus, "} = ", hemi_volum)

**Output:**

The Surface Area of the given Hemisphere with radius { 9 } = 763.02 The Volume of the given Hemisphere with radius { 9 } = 1526.04

### Method #2: Using Mathematical Formula (User Input)

**Approach:**

- Import the math module using the import keyword.
- Give the hemisphere’s radius as user input using the float(input()) function and store it in a variable.
- Take a variable and initialize it with the value of pi as 3.14.
- Calculate the surface area of the given hemisphere using the above given mathematical formula and math.pow() function.
- Store it in another variable.
- Calculate the volume of the given hemisphere using the above given mathematical formula and math.pow() function.
- Store it in another variable.
- Print the hemisphere’s surface area with the given radius of the hemisphere.
- Print the hemisphere’s perimeter with the given radius of the hemisphere.
- The Exit of the program.

**Below is the implementation:**

# Import the math module using the import keyword. import math # Give the hemisphere's radius as user input using the float(input()) function and # store it in a variable. gvn_radus = float(input("Enter some random variable = ")) # Take a variable and initialize it with the value of pi as 3.14 . valof_pi = 3.14 # Calculate the surface area of the given hemisphere using the above given mathematical # formula and math.pow() function. # Store it in another variable. hemi_surfceara = 3*valof_pi*math.pow(gvn_radus, 2) # Calculate the volume of the given hemisphere using the above given mathematical formula # and math.pow() function. # Store it in another variable. hemi_volum = (2.0/3.0)*valof_pi*math.pow(gvn_radus, 3) # Print the hemisphere's surface area with the given radius of the hemisphere. print("The Surface Area of the given Hemisphere with radius {", gvn_radus, " } = ", hemi_surfceara) # Print the hemisphere's perimeter with the given radius of the hemisphere. print("The Volume of the given Hemisphere with radius {", gvn_radus, "} = ", hemi_volum)

**Output:**

Enter some random variable = 12.5 The Surface Area of the given Hemisphere with radius { 12.5 } = 1471.875 The Volume of the given Hemisphere with radius { 12.5 } = 4088.5416666666665