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要看你要問什麼了!BEC的面積是20平房釐米.DEC的面積是10平房釐米.ABE的面積是10平房釐米.AD的長是5釐米.BC的長是10釐米.三角形ADE的高是2釐米.三角形BCE的高是4釐米.還想問什麼給我留言吧!
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