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176 = 2 x 22/7 x r
176 = 44/7 r
r = 44/7/176
r = 44/7 x 1/176
r = 28 (d)
phi=22/7
dit:jari2=.....?
jawab:k=2×phi×r
176=2×22/7×r
176=44/7×r
r=44/7/176=7×176/44
r=1232/44
r=28 (d)