Given: abc, sb is perpendicular to ac, and measure of ange 1 = measure or angle 2 prove: measure of angle 3=measure of angle 4

What change took place in china's southwest region after the communists came to power? a) encouraged by government policies, the economic base of the region changed from agriculture to nòmadic herding. b) the communist government established a special economic zone in the region. c) the leader of the religion practiced in the region went into exile, d) the leader of the religion practiced in the region was executed.