please help me to deal this question thanks

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/25 20:40:16

please help me to deal this question~~ thanks~~
five touching circles each have radius 1 and their centres are at the vertices of a regular pentagon . What is the radius of the circle through the touching points?
A.tan18 B.tan36 C. tan45 D.tan54 E tan 72

应该是 B

please help me to answer this question ,ok thanks ask a question,please help me,thanks! please help me to translate this sentence,thanks Please help me to translate this sentence,thanks! help me answer this question please help me please translate this sentence thanks. 请问谁看过花木兰?Please help me.Thanks!question:Mulan please help me to answer below question please help me to solve the question Please Help me to Translate,Thanks Please help me!Thanks! Please help me to solve this question with working.Thank you