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Re:Calculating the intersection area of 3 or more circles by pbhjpbhj on Wednesday July 01, 2015 @07:36AM (#9811188)
Where are you? Which "good" (as opposed to exceptional) primary school students know trig?

In the UK chords aren't mentioned in the maths curriculum until KS4 (late secondary school, 14-16yo) - https://www.gov.uk/government/publications/national-curricul....

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