I'm going to say mountains. They had to develop and adapt in order to live within the conditions of mountains. If you know Sparta, you can somewhat relate them to the Incas in regards to how they adapted to their geographic features.
The answer is 29. If you look at the triangle on top of it, with the obtuse angle being 122 you can see that that triangle and DEF are the same. And because the degrees of a triangle is always 180 you can subtract 122 from 180:
180
-122
That equals 58 and because there are two sides we need to divide 58 by 2:
58/2
this equals 29 so
z = 29
:)
The answer to your question is i think c . hope this will help.
A difficulty voting hope that helps
