题目

两个直角三角板如图摆放，其中 ， ， ， AB与 DF 交于点 M ．若 ，则 的大小为（ ）A．B．C．D． 答案：C【分析】 根据 ，可得 再根据三角形内角和即可得出答案． 【详解】 由图可得∵ ， ∴ ∴ 故选： C． 【点睛】 本题考查了平行线的性质和三角形的内角和，掌握平行线的性质和三角形的内角和是解题的关键． 补全对话。 A.I'm Wang Lin. B.Which one do you want? C.We want to climb Lushan (爬庐山). D.How much is it? E.I want to buy some tickets. A: May I help you?B: Yes, 1.            A: All right. To where? B: 2.            So we want to buy the tickets to the nearest station (最近的车站) on Saturday evening.A: OK. Starts at 10:50P.m.and arrives at 11:00 a.m. to Lushan Railway Station, Jiangxi Province (江西省). B: That's nice. 3.            A: 100yuan for the hard seat and 180yuan for the soft seat. 4.            B: I want the hard seat. A: All right. 10 hard seat tickets. And your name? B: 5.           Thank you!