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s2 = 9x
s3 = 17x
K.segitiga = s1 + s2 + s3
217 = 5x + 9x + 17x
217 = 31x
x = 217:31 = 7
jadi, s1 = 5x = 5.7 = 35 cm
s2 = 9x = 9.7 = 63 cm
s3 = 17x = 17.7 = 119 cm (C)
13) p = 5/3 . 120 mm
= 200 mm (B)
cm bs jwb it dl y...