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b.sudutACB = 60°
c.sudutACG = 120°
d.sudutFCG = 180° - 120 ° = 60°
e.sudutBCF = 180° - 60° = 120°
f.sudutEBC = 120°
g.sudutDBE = 60°
somoga benar & membantu, maaf no 5 ga ngerti :)