This design is based on inscribing 6 semi circles inside a circle, two times. More pleasing mathematically to complete using compass and pencil, but these pictures were drawn using free downloadable version of cabri classic, (before being edited in Paint) making use of their arc drawing function instead of the compass. Still an interesting challenge, and to ensure the semi circles were reasonable accurate, used the angle measurer to establish a 90 degree angle between the three points on the arc. Can you explain why this might be useful?
If you don't like my colour scheme, presumable you can download the plain version and colour it in yourself!
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