• math domain error

 

When I'm trying import a 'math' module, I takes a message: 'math domain error'

From: https://py.checkio.org/mission/triangle-angles/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0
Created at: Nov. 27, 2016, 9:08 a.m.; Updated at: July 5, 2017, 5:18 p.m.
The question is resolved.