ok the proof is kinda complicated and i honestly dont want to wright it out lol but try it out because it works. So my equation states that an inscribed circle in a square has the surface area of the square x pi/4. So say you have a square with side lengths of 5 so the SA of that square is 25. if you had a circle inscribed into that square so thus the circle has a radius of 2.5, the surface area would be equal to 25 x pi/4. This also works with a cylinder inscribed into a 3D box. so say the box had a volume of base 5 x depth 5 x height 10 = 250, the inscribed cylinder would have a volume of 250 x pi/4. take out your calculators and compare it to the regular volume and SA equations for cylinders and circles, its true. Has anyone heard of or seen this before? its nothing amazing i am just a 12th grade student who got bored in class one day and did a math proof lol just thought it would be cool if i was the first to come up with it.