如图,在△ABC中,AB=AC,以AB为直径的圆O交BC于点D,交AC于点E,过点D作DF⊥AC,垂足为F.(1)求证:DF为⊙O的切线;(2)若过A点且与BC平行的直线交BE的延长线于G点,连接CG.当△ABC是等边三角形时,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/30 04:54:46
![如图,在△ABC中,AB=AC,以AB为直径的圆O交BC于点D,交AC于点E,过点D作DF⊥AC,垂足为F.(1)求证:DF为⊙O的切线;(2)若过A点且与BC平行的直线交BE的延长线于G点,连接CG.当△ABC是等边三角形时,](/uploads/image/z/13867985-65-5.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2C%E4%BB%A5AB%E4%B8%BA%E7%9B%B4%E5%BE%84%E7%9A%84%E5%9C%86O%E4%BA%A4BC%E4%BA%8E%E7%82%B9D%2C%E4%BA%A4AC%E4%BA%8E%E7%82%B9E%2C%E8%BF%87%E7%82%B9D%E4%BD%9CDF%E2%8A%A5AC%2C%E5%9E%82%E8%B6%B3%E4%B8%BAF%EF%BC%8E%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9ADF%E4%B8%BA%E2%8A%99O%E7%9A%84%E5%88%87%E7%BA%BF%EF%BC%9B%EF%BC%882%EF%BC%89%E8%8B%A5%E8%BF%87A%E7%82%B9%E4%B8%94%E4%B8%8EBC%E5%B9%B3%E8%A1%8C%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%BA%A4BE%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8EG%E7%82%B9%2C%E8%BF%9E%E6%8E%A5CG%EF%BC%8E%E5%BD%93%E2%96%B3ABC%E6%98%AF%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2%E6%97%B6%2C)
xTKnP
VAE8zPHB!vi,Jp@HR$Gb)ƿ/"F0zs.K^5'DLaм&z/ZAm%2
_|tU$ 6p:5Q
6:[ynRBx,
q[6'N@f_xT|$gGɁl8'4ö_fa|g#b+z\
|7+1X\on:[|TJ5.<9OB&; ]q*GwaA)[`[