Chat with our AI personalities
If they are beyond repair, I cut them off with a thin metal cutting disc in an angle grinder.
Very little ! With no identifying markings at all - it's essentially just a small metal disc !
No When a right cylinder is viewed at right angle to its axis the projected form can be a square or a rectangle, which have 4 right angles. The same applies if the cylinder is cut through on any plane parallel to its axis.
Area of disc: pi*6^2 = 36*pi square cm
Pi*6 * * * * * Independent of the radius? Makes no difference if the disc is twice as wide? I think not! It is actually 2*pi*r2 where r is the radius of the disc.