八年级第一学期数学练习册p74(有两道)1.如图,点A是等腰直角三角形ABC的直角顶点,AD平行于BC,BD等于BC,BD交AC于点E,AF垂直BC,垂足为点F 求证〔1〕AF=1/2BD 〔2〕角CBD=30度 〔3〕DC=EC
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![八年级第一学期数学练习册p74(有两道)1.如图,点A是等腰直角三角形ABC的直角顶点,AD平行于BC,BD等于BC,BD交AC于点E,AF垂直BC,垂足为点F 求证〔1〕AF=1/2BD 〔2〕角CBD=30度 〔3〕DC=EC](/uploads/image/z/13811390-62-0.jpg?t=%E5%85%AB%E5%B9%B4%E7%BA%A7%E7%AC%AC%E4%B8%80%E5%AD%A6%E6%9C%9F%E6%95%B0%E5%AD%A6%E7%BB%83%E4%B9%A0%E5%86%8Cp74%EF%BC%88%E6%9C%89%E4%B8%A4%E9%81%93%EF%BC%891.%E5%A6%82%E5%9B%BE%2C%E7%82%B9A%E6%98%AF%E7%AD%89%E8%85%B0%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E7%9B%B4%E8%A7%92%E9%A1%B6%E7%82%B9%2CAD%E5%B9%B3%E8%A1%8C%E4%BA%8EBC%2CBD%E7%AD%89%E4%BA%8EBC%2CBD%E4%BA%A4AC%E4%BA%8E%E7%82%B9E%2CAF%E5%9E%82%E7%9B%B4BC%2C%E5%9E%82%E8%B6%B3%E4%B8%BA%E7%82%B9F+%E6%B1%82%E8%AF%81%E3%80%941%E3%80%95AF%EF%BC%9D1%EF%BC%8F2BD+%E3%80%942%E3%80%95%E8%A7%92CBD%EF%BC%9D30%E5%BA%A6+%E3%80%943%E3%80%95DC%EF%BC%9DEC)
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