thất giác

== Vietnamese == === Etymology === Sino-Vietnamese word from 七角, composed of 七 (“seven”) and 角 (“angles”). === Pronunciation === (Hà Nội) IPA(key): [tʰət̚˧˦ zaːk̚˧˦] (Huế) IPA(key): [tʰək̚˦˧˥ jaːk̚˦˧˥] (Saigon) IPA(key): [tʰək̚˦˥ jaːk̚˦˥] === Noun === thất giác (geometry) heptagon