Three Overlapping Circles - making a Venn Diagram

[Acorn]

This Challenge it to present three overlapping circles whose centres touch the edge of the other two circles.

Again, the construction is to be as simple and as accurate as the Xara Desktop application allows.
This time, any of the circles can be cloned for use in your construction.
You can assume the solution of the previous two Circle Challenges or start afresh.



Acorn