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菱形的周長為8cm,則它邊長是2釐米. 兩鄰角的度數之比為1:2,則較小角為:180°÷(1+2)=60° 連接兩條對角線,得其長分別是2和2√3 菱形面積:2×2√3÷2=2√3(平方釐米) 願對你有所幫助!
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