Usage History of 'semiangle'

The following chart shows how frequently 'semiangle' appeared in printed materials over time. For example, the word 'semiangle' occurred 1 time in books in 1715 and 135 times in 2008. From 1715 to 2008, the word 'semiangle' was used a total of 6,369 times in books scanned by Google. See Reference: Google Ngram project.

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