三角形ABC,E、F三等分AC,BC边上DB=2DC,连接BE,BF,AD相交于H,G,求四边形EF | |
已知正方形ABCD中,E为对角线BD上一点,过E点作EF⊥BD交BC于F,连接DF,G为DF中点 |
三角形ABC,E、F三等分AC,BC边上DB=2DC,连接BE,BF,AD相交于H,G,求四边形EF | |
已知正方形ABCD中,E为对角线BD上一点,过E点作EF⊥BD交BC于F,连接DF,G为DF中点 |
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