Someone please help me to solve this sum!

来源：学生作业帮编辑：搜搜考试网作业帮分类：英语作业时间：2024/07/04 08:09:48

In the figure,EADH and FBCG are straight lines. Find n.
PS Its better to show all steps and in English.Thanks.

360-110-60-35=155（四边形内/外角和360）
再问： All Steps?
再答： yes
再问： do u know how to write in English? (i mean the reason四边形内/外角和360?)

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