Question 967764
The "width" of a circle is its diameter,
which is twice its radius.
If the diameter of a circle is {{{186mm}}} ,
the radius of that circle is
{{{186mm/2=93mm}}}
{{{drawing(300,300,-1.2,1.2,-1.2,1.2,
red(circle(0,0,0.02)),
red(circle(0,0,1)),
green(arrow(0.5,0,0.02,0)),green(arrow(0.5,0,02,0)),
green(arrow(-0.5,0,-0.02,0)),green(arrow(-0.5,0,-1,0)),
green(arrow(0.25,0.433,0.5,0.866)),green(arrow(0.25,0.433,0,0)),
green(arrow(-0.433,-0.25,0,0)),green(arrow(-0.433,-0.25,-0.866,-0.5)),
green(arrow(-1,0.2,-1,-1.5)),green(arrow(1,0.2,1,-1.5)),
green(arrow(-0.3,-1.1,-1,-1.1)),green(arrow(0.3,-1.1,1,-1.1)),
locate(-0.24,-1.04,green(diameter)),locate(0.25,0,green(radius)),
locate(-0.75,0,green(radius)),locate(0.25,0.433,green(radius)),
locate(-0.433,-0.25,green(radius))
)}}}