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Panjang AB (d) = 12 cm
Panjang BQ (r) = 4 cm
Panjang OA (R) = 5 cm
Panjang OQ (p) =?
p2 = (R+r)2 + d2
p2 = (5+4)2 + 12 kuadrat
p2 = 9 kuadrat + 12 kuadrat
p2 = 81 + 144
p2 = 225
p = akar 225
p = 15 cm
Jadi, panjang kedua titik pusat OQ adalah 15 cm