Jawabanmu

2014-09-01T17:06:50+07:00
AC = akar 3 kuadrat + 4 kuadrat
AC = akar 9 + 16
AC = akar 25
AC = 5

PR = AB per PQ = AC per PR
 3 per 4,5 = 5 per PR
 3 PR = 4.5 * 5
 PR = 22.5 : 3 = 7.5 cm