That would be <span>the Department of Homeland Security</span>
<span>According to the "domino" theory, if one nation adopted Communism, nearby nations would be likely to adopt it as well, since this resembled one single domino knocking over many more. </span>
The drawings, in turn, may represent the sounds that early humans generated in those spots. ... Cave artists were thus not just early-day Monets, drawing impressions of the outdoors at their leisure. Rather, they may have been engaged in a process of communication.
Here's the solution,
_______________
Sum of interior angles of a triangle measures 180°
So,
=》

=》

=》

=》

hence, the value of x = 30°