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連接菱形的倆對角線,則被分成四個全等的直角三角形,其直角邊分別為對角線長的一半,4√3和4,斜邊長即為菱形的邊長,√(48+16)=8,根據三十度所對的直角邊是斜邊的一半,可得原菱形一內角大小為2*30度=60°,其鄰角為120°.所以其內角分別為60°和120°
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