Cuantas tienen que ver con cuestiones culturales? libro tele secundaria pag 145 geografía ​

An earthquake’s epicenter can be determined from arrival time data recorded on a(

In the diagram, δgef and δhef are congruent. what is the value of x?

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?