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菱形的相鄰兩角的度數之比是1比2,相鄰兩角的度數分別是60120; 則短對角線與邊長相等,長對角線是短對角線的根號3倍. 菱形周長是16釐米,邊長是4釐米,面積是0.5*4*4√3= 8√3平方釐米.
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