Jawabanmu

2014-04-15T19:10:27+07:00
3a+60o = ...
3a= 60°
a= 20°
2014-04-15T19:44:29+07:00
3a + 60o =.. 3a = 60o a = 60 / 3 a= 20 3a + 60 3(20)+60 = 120