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sudutnya = 3 x 30 + 1/3 x 30 = 90 + 10 =100
B. sudutnya = 3x 30 - 1/5 x 30 = 90 - 6 =84
C. 3 x 30 + 1/60 x 30 = 90 + 0,5 = 90,5
D. 2x 30 + 2/3 x 30 = 60 + 20 = 80