2.
如图,
,
,
,试说明
.请完善解答过程,并在括号内填写相应的理论依据.
![](//tikupic.21cnjy.com/1024/2024/06/17/c6/a5/c6a5dfe2395073497ae3d0b966090f8e_206x171.png)
解:,(已知)
__________.(_______________________________________)
.(_______________________________________)
,(已知)
.(等量代换)
.(_______________________________________)
__________.(两直线平行,同位角相等)
,(已知)
.(_______________________________________)
.(等量代换)