Respostas

2014-04-09T00:11:44-03:00
S + Z + 90 = 180 ⇒ S + Z = 90
t + x + 90 = 180 ⇒ t + x = 90
y + w + 90 = 180 ⇒ y + w = 90
(S + Z) + (t +x) + (y + w) = 90 + 90 + 90 = 270
R = 270
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