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pentagon 音標拼音: [p'ɛntɪg,ɑn] [p'ɛnɪg,ɑn] n. 五角形,五邊形 五角形,五邊形 Pentagon n 1: a government building with five sides that serves as the headquarters of the United States Department of Defense 2: the United States military establishment 3: a five-sided polygon Pentagon \Pen"ta*gon\, n. [Gr. penta`gwnon; penta- (see
{Penta-}) gwni`a angle: cf. L. pentagonium, F. pentagone.] (Geom.) A plane figure having five angles, and, consequently, five sides; any figure having five angles. [1913 Webster] {Regular pentagon}, a pentagon in which the angles are all equal, and the sides all equal. [1913 Webster]
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