Creations such as these can be introduced to beginning Geometry students, without even needing what is in red. Demonstrating the shapes, and how they are created using chords and midpoints, can be seen as a possible motivator for the later study of trigonometry and polar coordinates. If we have a "core" be it "common" or not, that does not allow time for such investigations, we will lose the academic race to those cultures, countries, and schools that do allow for it.
This was made in GeoGebra in 10 minutes. If I had been able to use this in the classroom....
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