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AD=BC，所以BE:AD=4:(4+5)=4:9
又△FBE和△FDA相似，對應邊皆為4:9
△ABF:△ABD=BF:BD=4:(4+9)=4:13
ABCD=2△ABD
故△ABF:ABCD=4:26=2:13
Mathematics
Junior High
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這個怎麼算🤷
0. 如右圖,平行四邊形ABCD中,已知BE:CE=4:5,則
AABF 面積:平行四邊形ABCD面積=.
。
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(請化簡成最簡整數比)
BE
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