香港寵物小精靈村落 論壇

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作者: orb    時間: 5/2/2005 02:29 PM
標題: 救我
若A是FC中間
B是AE中間
△BCD = 6cm square
口FCED= ?

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作者: 998877    時間: 5/2/2005 05:30 PM
還有没有提示

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作者: orb    時間: 5/2/2005 05:47 PM
標題: ↑
Not IQ question

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作者: 998877    時間: 5/2/2005 06:25 PM

Originally posted by eeEric at 2005-2-5 05:47 PM:
Not IQ question

我想問還有没有資料

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作者: 抹茶可樂    時間: 5/2/2005 08:59 PM
Join AD
Extend CBG such that G is a point at DE
Join AG as well

ACEG is a rectangle and G is a mid-point at DE

Then AFD~GEC(SAS)

AD//CG

Area of ABC = Area of BCD
Area of 2ABC = Area of ACE
Area of 4ACE = Area of FCED

Area of ABC = 48 cm^2

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