Jawabanmu

2014-04-18T22:16:59+07:00
PR = akar (P^2- (R-r)^2)
     = akar (24 ^2-(5 -2) ^2
     = akar 576 - (25 - 4)
       = akar 576 -21 = akar 546
2014-04-18T22:23:40+07:00
Semoga membantu :)......