Draw a line (cord) across the circle approximately 1/3 the way across.
Find the midpoint of the line and draw another line perpendicular
to the first line. You can use a compass for this step by setting
it to a span greater than 1/2 the length of the cord and centering the
compass at each end of the cord. The arcs drawn by the compass will
intersect in two places. Drawing a line between the two intersections
will result in a line perpendicular to the first, intersecting it at
the midpoint. This line will be a diameter of the circle. Find
the midpoint of the second line which will be the center of the circle.
Alternatively, repeat the process with a cord that is not
parallel to that of the first cycle. Where the two second lines
cross will be the center.
Jim
(you're probably better off using the hole saw pilot bit)
--- Ronald G Trimmer <trimmer@charter.net> wrote:
>
> I have a circle and I want to find the center so I can use a hole
> saw to cut a hole. What is the simplest way to find the center of the
> circle?
>
> --
> Best regards,
> Bill mailto:w.gilroy@verizon.net
=====
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Realtime Embedded Systems Specialist pager: (703) 706-8722
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