Inspired by Chester Robinson - Part 2

Geometry Level 4

What is the least number of circular arcs needed to cover all 16 spots if you were using a pen and it could not be removed from the page?

Treat the spots as a 0-dimensional object. They do not have length or width.
Treat the circular arcs as a 1-dimensional object. They do not have width. Each arc is the arc of a circle of fixed radius. You cannot simply use a curved line.



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