Can you have a perfect circle?

[Stewart]

 

[skipper734]

2 Pi r

 

[Titus]

What goes a round comes a round.

 

[seagullondon]

 

[element]

Someone once told me Leonardo Da Vinci could draw perfect circles with both hands (Was prob using one of those school type big wooden things with a point and a chalk holder )

 

[Frutos]

Dunno, but you can get a perfect square for £11 on Amazon if that helps:

Perfect Square [DVD] [2004]: Amazon.co.uk: R.E.M.: Film TV

 

[Deleted member 18477]

That is just perfect!

 

[Stewart]

WRONG.

This circle is not perfect.

 

[SeagullSongs]

Theoretically, yes. Practically no.
An electron is an almost perfect sphere. If you scaled it up to the size of the solar system, the deviation from a perfect sphere would be less than a hair's breadth.

 

[element]

A bore that a piston goes up and down in in an engine must be a perfect circle, or it would not hold the compression needed to operate, Shirley

 

[Puppet Master]

My bum's in mint condition. It's got a hole through the middle.

 

[SeagullSongs]

A bore that a piston goes up and down in in an engine must be a perfect circle, or it would not hold the compression needed to operate, Shirley

Only if the piston itself is perfectly circular, shirley?

 

[element]

Only if the piston itself is perfectly circular, shirley?

Incorrectamundo, I'm afraid

The piston, per se, has minimal contact with the bore. It's the piston rings wrapped round the piston, and to some extent, the skirt, that actually touch the bore...

I see the OP has highlighted the word perfect in relation to the circle, so is no doubt going down some philosophical road to 'prove' it's impossibility

Karl Popper's Falsification theory would argue that just because there is NO perfect circle known of at the moment, it doesn't follow that one will not turn up at some point

 

[seagullondon]

My bum's in mint condition. It's got a hole through the middle.

 

[element]

*singing

'Where's the OP gone, the OP gone, where's the OP gone, the OP gone, far far away...' and fade to grey...

 

[Pbseagull]

pi is proven to be an irrational (even transcendent) number, so there is no end, no repetition. Calculating digits of pi is more a kind of benchmark for supercomputers and a prestige thingy.

Should you want to do this yourself, just calculate 4*(1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + ...). This is pi, and if that isn't perfect, I don't know what perfect is

 

[Dub-67]

not in 3 dimensions because space time is curved by gravity.

 

[prawnsarnies]

If it was perfick it would be a magic circle.

 

[smeariestbat]

not in 3 dimensions because space time is curved by gravity.

that would make it a sphere not a circle

 

[Dub-67]

that would make it a sphere not a circle

nah I'm talking about a circle.. I'#m being a bit of a nob though.. coz what I'm saying is that in the 3 dimension that we live in, you cant technically draw anything on a perfectly flat plane. Because spacetime bends under gravity.. so nothing is truly flat.. but how about a dancing banana ?