Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


JT
Posts:
1,434
Registered:
4/7/12


The relation between circumreference and radius of circle
Posted:
May 5, 2013 7:58 AM


Is of course Pi but Pi is irrational and have a unfinished decimal expansion. How much work has been done in geometry to find a none irrational substitute to Pi by replace the radius with some other property of the circle that do not lead to a irrational expression?
Well my quetsion maybe even not correct stated, but if there was a relation between some aspect of a polygon and the circumrefrence that had closed decimal expansion, would that be used instead of the radius and Pi to calculate the circumreference and area of the circle?
So is it possible that there could be another expression to calculate circles circumreference and area that is not an approximation, by using rounded numbers?



