tastetherainboovwtyc tastetherainboovwtyc

14-03-2018
Mathematics

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sqdancefan sqdancefan

14-03-2018

Each of the short arcs is 1/3 of the circle, so is 120°.

arc AB = 120°
arc ABC = arc AB + arc BC = 240°
angle AOB = arc AB = 120°

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