American English

Definition of equilateral triangle noun from the Oxford Advanced American Dictionary

 

equilateral triangle

 noun
noun
NAmE//ˌikwəˌlæt̮ərəl ˈtraɪæŋɡl//
 
(geometry)
 
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a triangle whose three sides are all the same length
See the Oxford Advanced Learner's Dictionary entry: equilateral triangle