You may start from the solution to https://www.talkgraphics.com/showthr...uching-Circles.
Attachment 122412
You, however, can create a Red, Green and Blue circle from afresh, each with a diameter of 200px.

The Challenge is to simply, and accurately, position the circles so that each circle equally intersects (overlaps) the other two circles but there is no overlap with all three circles.

Click image for larger version. 

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Acorn