Jawabanmu

2014-02-25T20:08:38+07:00
Sp: 80 drajat

sk = 1/2 sp
sk = 1/2 . 80
sk = 40
2014-02-26T00:15:30+07:00
80° = 2 X SUDUT KELILING SUDUT KELILING = 80° : 2 = 40°