I made test tube in desmos. I couldn't help it.
Took me the better part of two hours of just smashing equations in by hand.
A bit of the code
And here's the actual link if you want to take a look (the inconsistency in line width has to do with the zoom level being variable. click on the actual link if you want to see with better line thickness)
https://sketchpad.app/en/ Good for sketching out problems you can’t do in your head
https://www.desmos.com/calculator It graphs out equations in front of you as you type it in
https://www.desmos.com/scientific It’s a scientific calculator I use it for sin, cos, and tan
https://www.calculator.net/triangle-calculator.html type in 3 values of a triangle and it will show you the rest
Remember those jokes about Second hallucinating AVmath?
I'm learning about polar equations in school
now I can make cool stuff :D