What is the angle α between the blue line and the baseline of the orange square?
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The heptagon square
![The heptagon square](https://mirangu.com/wp-content/uploads/2024/01/HeptagonSquare.jpg)
What is the angle α between the blue line and the baseline of the orange square?
A regular 7-gon inscribed in a circle (ABCDEFG), with some other point H on the circle, in the arc CD. Show that the length sum of the blue chords equals the length sum of the green chords.