如图,∠=1=∠ABC=∠ADC,∠3=∠5,∠2=∠4,∠ABC+∠BCD=180°∵∠2=∠4(已知)∴___∥ __(__________________)∵∠1=∠ABC(已知)∴___∥____(_____________________)
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![如图,∠=1=∠ABC=∠ADC,∠3=∠5,∠2=∠4,∠ABC+∠BCD=180°∵∠2=∠4(已知)∴___∥ __(__________________)∵∠1=∠ABC(已知)∴___∥____(_____________________)](/uploads/image/z/5040570-66-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E2%88%A0%3D1%3D%E2%88%A0ABC%3D%E2%88%A0ADC%2C%E2%88%A03%3D%E2%88%A05%2C%E2%88%A02%3D%E2%88%A04%2C%E2%88%A0ABC%2B%E2%88%A0BCD%3D180%C2%B0%E2%88%B5%E2%88%A02%3D%E2%88%A04%EF%BC%88%E5%B7%B2%E7%9F%A5%EF%BC%89%E2%88%B4___%E2%88%A5+__%EF%BC%88__________________%EF%BC%89%E2%88%B5%E2%88%A01%3D%E2%88%A0ABC%EF%BC%88%E5%B7%B2%E7%9F%A5%EF%BC%89%E2%88%B4___%E2%88%A5____%EF%BC%88_____________________%29)
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如图,∠=1=∠ABC=∠ADC,∠3=∠5,∠2=∠4,∠ABC+∠BCD=180°∵∠2=∠4(已知)∴___∥ __(__________________)∵∠1=∠ABC(已知)∴___∥____(_____________________)
如图,∠=1=∠ABC=∠ADC,∠3=∠5,∠2=∠4,∠ABC+∠BCD=180°
∵∠2=∠4(已知)
∴___∥ __(__________________)
∵∠1=∠ABC(已知)
∴___∥____(_____________________)
如图,∠=1=∠ABC=∠ADC,∠3=∠5,∠2=∠4,∠ABC+∠BCD=180°∵∠2=∠4(已知)∴___∥ __(__________________)∵∠1=∠ABC(已知)∴___∥____(_____________________)
∵∠2=∠4(已知)
∴__AD_∥ _BC_(内错角相等,两直线平行)
∵∠1=∠ABC(已知)
∴__AD_∥__BC__(同位角相等,两直线平行)
...来晚了 有人做完了= =
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