Jawabanmu

2014-06-11T05:50:18+07:00
Jawaban paling cerdas!
2014-06-11T11:26:48+07:00
1.
3x = 60
x = 60 / 3
x = 20°

2.
RS = 20 / 2 = 10

PS =  \sqrt{PR^2 - RS^2}
PS =  \sqrt{12^2 - 10^2}
PS =  \sqrt{144 - 100}
PS =  \sqrt{44}
PS =  2\sqrt{11}