四边形ABCD,AE=1/3ED,CE垂直于AD,CE评分角BCD,求四边形ABCE和三角形CDE的面积比?请出示过程,以诚相待!
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四边形ABCD,AE=1/3ED,CE垂直于AD,CE评分角BCD,求四边形ABCE和三角形CDE的面积比?请出示过程,以诚相待!
四边形ABCD,AE=1/3ED,CE垂直于AD,CE评分角BCD,求四边形ABCE和三角形CDE的面积比?请出示过程,以诚相待!
四边形ABCD,AE=1/3ED,CE垂直于AD,CE评分角BCD,求四边形ABCE和三角形CDE的面积比?请出示过程,以诚相待!
∵ABCD为平行四边形∴∠FDB=∠DBC 又因为∠FED=∠BEC ∴△FDE∽△CBE ∵E为OD中点 又因为OD=OB ∴BE=3ED 所以DF=1/3BC=6
%BD%E2%A3%BA%D7%F7PG%B4%B9%D6%B1%D3%DABC%0D%0A%A1%DF%CB%C4%B1%DF%D0%CEABCD%CA%C7%D5%FD%B7%BD%D0%CE%0D%0A%A1%E0PG%C6%BD%D0%D0DC%0D%0A%A1%E0%A1%CFDPC%3D90%A1%E3%0D%0A%D3%D6%A1%DF%A1%F7PBC%CE%AA%B5%C8%B1...
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%BD%E2%A3%BA%D7%F7PG%B4%B9%D6%B1%D3%DABC%0D%0A%A1%DF%CB%C4%B1%DF%D0%CEABCD%CA%C7%D5%FD%B7%BD%D0%CE%0D%0A%A1%E0PG%C6%BD%D0%D0DC%0D%0A%A1%E0%A1%CFDPC%3D90%A1%E3%0D%0A%D3%D6%A1%DF%A1%F7PBC%CE%AA%B5%C8%B1%DF%C8%FD%BD%C7%D0%CE%0D%0A%A1%E0%A1%CFPCD%3D%A1%CFDCB-%A1%CFPCB%3D90%A1%E3-60%A1%E3%3D30%A1%E3%0D%0A%D3%D6%A1%DF%D5%FD%B7%BD%D0%CEABCD%B5%C4%B1%DF%B3%A4%3D20%0D%0A%A1%E0PD%3D1%2F2DC%3D10%0D%0A%BC%B4%A3%BART%C8%FD%BD%C7%D0%CEDPC%B5%C4%C3%E6%BB%FD%3DPC%A1%C1PD%A1%C11%2F2%3D100%0D%0A%D2%F2%B9%B4%B9%C9%B6%A8%C0%ED%B5%C3PG%3D10%B1%B6%B8%F9%BA%C53%0D%0A%A1%E0S%A1%F7PBC%3D1%2F2PG%A1%C1BC%3D5%B1%BB%B8%F9%BA%C53%A1%C120%3D100%B1%B6%B8%F9%BA%C53%0D%0AS%CB%C4%B1%DF%D0%CEPBCD%3DS%A1%F7PBC%2BRT%C8%FD%BD%C7%D0%CEDPC%B5%C4%C3%E6%BB%FD%3D100%2B100%B1%B6%B8%F9%BA%C53%0D%0AS%A1%F7DCB%3D1%2F2DC%A1%C1BC%3D200%0D%0AS%D2%F5%D3%B0%3DS%CB%C4%B1%DF%D0%CEPBCD-S%A1%F7DCB%3D100%2B100%B1%B6%B8%F9%BA%C53-200%3D%B8%F9%BA%C53
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