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octagon

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octagon /ˈɑːktəˌgɑːn/ noun
plural octagons
octagon
/ˈɑːktəˌgɑːn/
noun
plural octagons
Learner's definition of OCTAGON
[count] mathematics
: a flat shape that has eight sides and eight angles — see picture at geometry

— octagonal

/ɑkˈtægənl̟/ adjective
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