Jawabanmu

2014-05-14T13:54:04+07:00
1. sudutnya kan 6x, (40+3x), sudut yg lagi 1 brapa ?
2.
∠A = 1/2 ∠C --> ∠C = 2∠A
∠B = 1½. ∠A = 3/2 
∠A
∠A + ∠B + ∠C = 180'
∠A + 3/2 ∠A + 2∠A = 180'
9/2 ∠A = 180'
∠A = 180' . (2/9) = 40'
∠B = 3/2.40' = 60'
∠C = 2.40' = 80'