Jawabanmu

2014-04-24T22:06:09+07:00
360 - (103-97-77)
360-277 = 83 derajat·
4 2 4
2014-04-24T22:41:20+07:00
360°-(103°+97°+77°)=360°-277°=83° Jadi sudut dalam yg hilang 83°
6 4 6