已知:如图,C是射线BA,DE之间的一点,连结BC,DC,且角BCD=角B+角D.求证:AB‖DE A______________B/C /\\E_______________________\DA___________________________________________ B/C /\\E__________________________________________\D
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 03:10:34
![已知:如图,C是射线BA,DE之间的一点,连结BC,DC,且角BCD=角B+角D.求证:AB‖DE A______________B/C /\\E_______________________\DA___________________________________________ B/C /\\E__________________________________________\D](/uploads/image/z/12543975-63-5.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A%E5%A6%82%E5%9B%BE%2CC%E6%98%AF%E5%B0%84%E7%BA%BFBA%2CDE%E4%B9%8B%E9%97%B4%E7%9A%84%E4%B8%80%E7%82%B9%2C%E8%BF%9E%E7%BB%93BC%2CDC%2C%E4%B8%94%E8%A7%92BCD%3D%E8%A7%92B%2B%E8%A7%92D.%E6%B1%82%E8%AF%81%EF%BC%9AAB%E2%80%96DE+A______________B%2FC+%2F%5C%5CE_______________________%5CDA___________________________________________+B%2FC+%2F%5C%5CE__________________________________________%5CD)
已知:如图,C是射线BA,DE之间的一点,连结BC,DC,且角BCD=角B+角D.求证:AB‖DE A______________B/C /\\E_______________________\DA___________________________________________ B/C /\\E__________________________________________\D
已知:如图,C是射线BA,DE之间的一点,连结BC,DC,且角BCD=角B+角D.求证:AB‖DE A______________B
/
C /
\
\
E_______________________\D
A___________________________________________ B
/
C /
\
\
E__________________________________________\D
已知:如图,C是射线BA,DE之间的一点,连结BC,DC,且角BCD=角B+角D.求证:AB‖DE A______________B/C /\\E_______________________\DA___________________________________________ B/C /\\E__________________________________________\D
反证法,
如果不平行
.