A regular hexagon and two semicircles connecting vertices. What’s the angle α between the chords?
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Solution
The angle α is 120°.
Poem
Bubble chamber
A vessel filled with liquid
But no water, no beer, no wine
A chamber full of hydrogen
Bubbles are everywhere
Bubbles of soap or water
Bubbles are coming and going
Bubbles of particles and clouds
They shine in the light
So coloured, so bright
the bubbles we like
