12. Determine as medidas x, y e z, em graus. Considere r//s,...
Determine as medidas x, y e z, em graus. Considere r//s, u e v as retas transversais.
a) x = 30°; y = 60°; z = 110°.
b) x = 35°; y = 63°; z = 115°.
c) x = 30°; y = 65°; z = 118°.
d) x = 40°; y = 68°; z = 120°.
e) x = 36°; y = 64°; z = 116°.