Solving one side of right-angled triangle using Pythagorean Theorem in Python

image source
In a right-angled triangle:
the square of the hypotenuse is equal to
the sum of the squares of the other two sides.

What Will I Learn?

This tutorial aims to:

• Solve one side of a right-angled triangle using Pythagorean Theorem in Python

Requirements

• Python IDLE

Difficulty

• Basic

Tutorial Contents

The Code:

First, we import sqrt function from math module into the current namespace.
from math import sqrt

Display an information about the program (may not be included).
print('This is a Pythagorean Theorem calculator! Calculate one side of right-angled triangle.')
print('Assume the sides are a, b, c and c is the hypotenuse.')

Second, ask the user on which side to calculate and assign it to a variable (i used variable 'choice').
choice = input('Which side (a, b, c) do you want to calculate? side: ')

Third, making if ... elseif condition statement.
If the user wants to find for the hypotenuse which is side c.
if choice == 'c':
a = float(input('Input the length of side a: '))
b = float(input('Input the length of side b: '))
Solving for the c with the formula: √a^2+b2
c = sqrt(a * a + b * b)
Display the value of side c
print('The length of side c is %g: ' %(c))

Else if, the user wants to find for the side b.
elif choice == 'b':
a = float(input('Input the length of side a: '))
c = float(input('Input the length of side c: '))
Solving for the b with the formula: √c^2-a2
b = sqrt(c * c - a * a)
Display the value of side b
print('The length of side b is %g: ' %(b))

Else if, the user wants to find for the side a.
elif choice == 'a':
b = float(input('Input the length of side b: '))
c = float(input('Input the length of side c: '))
Solving for the a with the formula: √c^2-b2
a = sqrt((c * c) - (b * b))
Display the value of side a
print('The length of side a is %g: ' %(a))

Lastly, if the input is invalid.
else:
print('Invalid Input!')

Curriculum

Please visit my previous tutorials:

• Solving Quadratic Equation in easiest way using Python

Thanks for reading! Hope you learn something.

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Posted on Utopian.io - Rewarding Open Source Contributors

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