Jawabanmu

2014-03-05T15:33:38+07:00
JAP kuadrat - (r1 - r2)kuadrat
17 kuadrat - (10 kuadrat - 2 kuadrat)
289 - 8 kuadrat
289 - 64
225
2014-03-05T15:37:52+07:00
Dikeahui : d = 17cm    r1 = 2     r2=10

Panjang garis persekutuan luar = \sqrt{ d^{2}-(r2-r1) ^{2}   }  =   \sqrt{ 17^{2}-(10-2) ^{2}   } =  \sqrt{ 289^{}-64  } =  \sqrt{225} = 15 cm