Create a File Containing Geometric Formulas

[AndrewHUNGNguyen]

Create a file that stores all geometry formulas calculating the perimeter, area, and volume of various shapes.

@extinctsion feel free to share your thoughts on this.

[AndrewHUNGNguyen]

@extinctsion if you think this is a good issue assign this to me.

[extinctsion]

Yes, methods relating to mensurations and geometry should have their own class. Pls make their classes and inside them you can include their methods.

[AndrewHUNGNguyen]

Created a PR at #83

[extinctsion]

#83
I think this PR was merged and resolved the issue. Hence, closing this issue