Is there such thing as a perfect circle?

My initial answer would be no, you cannot draw, create, or make a perfect circle in any way, it simply cannot be done.

You may think that if you get a compass, and draw a circle on a piece of paper that the circle you draw will indeed be perfect, but it won't be, in fact, it will be far off perfect, extremely imperfect in fact, but why? Well, I'm here to tell you why.

Firstly, to have a perfect circle, you would have to have a shape where every single point is the EXACT same distance away from the centre. And by exact I mean exact, exactly the same. In scientific terms, you would find it extremely difficult to draw two lines the exact same length, next to each other, but why?

If I say to you now, draw two lines parallel to each other on a sheet of paper, both MUST be exactly 1cm long. You would get a ruler, and carefully measure two 1cm lines next to each other on your piece of paper. "Haha!" You may say. "Two lines, both exactly 1cm in length, there you go." Wrong my friend, let's look a bit closer.

So we measure with a ruler, down to the millimetre (1/10 of a centimetre). Hmm, looks pretty much the same, let's go deeper. So I get out another special ruler, with micrometres on it. (1/100) of a cm. And there you have it, one line is 3 micrometres longer than the other. I looked closer at it and showed you that those lines are not indeed equal, you could not do it!

But if you did manage to do it, then you could just measure the two lines in nanometres (A millionth of a metre) and so on until you would get down to yoctometres (which you wouldn't have done, but anyway, this is an example). A yoctometre is a 100,000th of the diameter of a neutron. If you don't know how small that is, that is so small that you can't even imagine it, it's so tiny that it is only used to measure things like how far light travels of the time of a septillionth of a second or something, which only weird scientists would even bother to find out. This length is so small it's hard core.

Why do I mention this length? Because, if you are someone who thinks that you can have a perfect circle, then that means you are saying that there has, or will be, or it is possible to draw a shape where every single point is exactly the same distance from the centre, in yoctometers. Even a computer wouldn't be able to do that, it simply just can't be done, by a computer or a human. 

But, as my friends have pointed out recently when I brought this up at school, it is not impossible. Who's to say that one day someone will do that, by fluke or something? But what I am saying is that no one has ever, in the history of the world drawn a perfect circle, and no one ever will, just because it's difficulty level is so extreme, it is the closest you can get to impossible, without something being impossible, in our entire universe. 

That's a big statement to make, that drawing a perfect circle is basically the most difficult thing that you can do in the whole entire universe, but I believe it's true, a perfect circle is very misunderstood by most, so please don't misunderstand it!