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How to find the center point of a circle

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FrizzleFried:

If you have a compass,  simply set the compass to draw the same sized circle you have already drawn...take a couple of test swipes...yup...same size...good...the pin----tallywhacker--- in the middle where you set your compass down to pivot is the middle...sheesh.



ivwshane:

And if you don't have a compass then draw a straight line any where in the circle, find the middle of that line and draw a perpendicular line, then measure and find the middle of that line, done , thats your center, no compass needed.



miles2912:

Draw a line square to the side of your cp where you want buttons.  Measure out a distance on the line how far apart you want your buttons (this will be the center of the button-circle).  Now with a small drill, drill out a hole.  Now use your hole saw or better yet forstner bit to drill the hole.

Casey120:

Cut out a paper circle the correct size , fold it in half and then in half again and maybe once more .
Now cut off just the small tip and unfold , voila your center spot is ready .
Stick that on your original circle and mark the middle hole with a pen marker .

A minute work .



Ed_McCarron:

Dunno, I just start by drawing the circle in AutoCad and dimensioning with a center mark...

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