15 POINTS In what country did the Revolutions of 1989 begin?

Select one:

a. Hungary

b. Poland

c. Bulgaria

d. East Germany

B. Poland

Explanation:

The collapse of the Berlin Wall was the culminating point of the revolutionary changes sweeping East Central Europe in 1989. Throughout the Soviet bloc, reformers assumed power and ended over 40 years of dictatorial Communist rule. The reform movement that ended communism in East Central Europe began in Poland.

b. Poland

Explanation:

The revolution began in Poland with the creation of Solidarity, the worker's movement that challenged the Communist government (the supposed representatives of the "workers' paradise) for authority. This was the first movement in the Eastern bloc that had not been brutally suppressed. This de-legitimized the Communist claim as representatives of the people's will. It continued when the Hungarian authorities decided to no longer interdict those seeking to leave the state by crossing the boundary between Hungary and Austria. This led to a flood of refugees from Eastern Europe streaming into Hungary to escape to the West. The defining event was then the collapse of the Berlin Wall in East Germany. With the exception of Romania, the revolutions were largely peaceful as the governments put up only token resistant to the clear will of the people for the end of Communist rule and democratic reform.

answer: this problem has only trivial solutions, with all points on the same line. x=5 or x=7/5.

step-by-step explanation:

there are three triangles, and three unknowns: x, y=length of middle segment, and z=cos(angles marked with red arc).

we need

and law of cosines,

the three equations are

see attached image for solution.