Area Calculator

Write a program to calculate the area of four different geometric shapes: triangles, squares, rectangles, and circles. You must use functions. Here are the functions you should create:

Name your file area_calculator.py

Your program should present a menu for the human to choose which shape to calculate, then ask them for the appropriate values (length, width, radius, etc.). Then it should pass those values to the appropriate function and display the resulting area.

Notice that you must not input the values inside the functions, and you must not display the values inside the functions. All input and output must be in the main() function, and values must be passed to the functions and returned from them.

You will need to construct your own main function and use the magical if __name__ == "__main__": statement as seen in previous assignments.

shape	formula
square	A = s²
rectangle	A = l × w
triangle	A = ½bh
circle	A = πr²

You’ll need the value of π for area_circle(); feel free to use the math library’s pi variable.

import math

math.pi  # 3.141592653589793

The menu should keep looping until the human chooses to quit.

Shape Area Calculator version 0.1 (c) 2005 Mitchell Sample Output, Inc.

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1) Triangle
2) Rectangle
3) Square
4) Circle
5) Quit
Which shape: 1

Base: 5
Height: 6

The area is 15.

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1) Triangle
2) Rectangle
3) Square
4) Circle
5) Quit
Which shape: 2

Length: 10
Width: 4

The area is 40.

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1) Triangle
2) Rectangle
3) Square
4) Circle
5) Quit
Which shape: 3

Side length: 9

The area is 81.

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1) Triangle
2) Rectangle
3) Square
4) Circle
5) Quit
Which shape: 4

Radius: 4

The area is 50.2655.

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1) Triangle
2) Rectangle
3) Square
4) Circle
5) Quit
Which shape: 5

Goodbye.

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©2021 Daniel Gallo

This assignment is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.

Adapted for Python from Graham Mitchell’s Programming By Doing