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jawabnnya A
Jari" diketahui = a = 6
Jari" ditanya = b
Jarak titik pusat = y = 17
x = akar y kuadrat - ( a + b ) kuadrat
15 = akar 17 kuadrat - ( 6 + b ) kuadrat
225 = 17 kuadrat - ( 6 + b ) kuadrat
225 = 289 - ( 6 + b ) kuadrat
( 6 + b ) kuadrat = 289 - 225
( 6 + b ) kuadrat = 64
6 + b = akar 64
6 + b = 8
b = 8 - 6
b = 2 (A)