2道英语题（加分）1.Thethreesidesofatriangleareoflengths1,m,andn,respectively.Thenumbers1,m,andnarepositiveintegers,1≤m≤n.Taken=9andfindthenumberofdifferenttrianglesofthedescribedkind.2.Tonumberthepagesofa

Question

2道英语题（加分）
1.The three sides of a triangle are of lengths 1,m,and n,respectively.The numbers 1,m,and n are positive integers,1≤m≤n.Take n=9 and find the number of different triangles of the described kind.
2.To number the pages of a bulky volume the printer used 1890 digits.How many pages has the volume?
请翻译,能解答更好!谢谢!

Answer 1

1.三角形三条边长各为1,m,n（1,m,n为正整数,1≤m≤n）,当n＝9时,列出符合要求的三角形.
答：只有一个,m=9,n=9时符合,它是等腰三角形.
2.数出一本有1890张纸的书有多少页?
答：这很简单,1890*2=3780(张).
保证正确!