The bubble chamber

A regular hexagon and two semicircles connecting vertices. What’s the angle α between the chords?

Scroll down for a solution to this problem.


The angle α is 120°.

Solution by Jaihind Singh.


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


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