It sounds like it is coming out of the joint. An x-ray would be a good idea, see a doctor to get that done.
No, it isn't possible to make a perfect circle because of plancks distance.
Radii are always positive. No, it is not possible to draw a circle with negative radius.
No. Unless the centrepoint of a circle is defined as a point of a circle.
It is possible. Just keep the drawing instrument 15.915 cm from a set point (the circle's center).
For a given perimeter, the circle has the largest area possible.
Absolutely! As long as the chord goes through the center of the circle.
Of course, it is not possible !
Yes
None but it's possible to construct shapes within a circle that have vertices.
yes
yes it is possible by using a coin
no, it's not possible. now u just have to figure out why. good luck