问题描述:
如图,∠=1=∠ABC=∠ADC,∠3=∠5,∠2=∠4,∠ABC+∠BCD=180°
∵∠2=∠4(已知)
∴___∥ __(__________________)
∵∠1=∠ABC(已知)
∴___∥____(_____________________)
∵∠2=∠4(已知)
∴___∥ __(__________________)
∵∠1=∠ABC(已知)
∴___∥____(_____________________)
问题解答:
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