coba geh yg pinter mtk bantuin, 26-28

26. AOB = 140 ÷ 4 = 35°
L = 35:140 = 35cm² : 140cm²
maka luas juring AOB = 35°

27.(2x+6) + (3x−16) = 180°
5x−10 = 180°
5x = 190°
x = 38°
∠BAD = 2(38)+6 = 82°

27. 1 sisi = 2 diagonal
maka 6 sisi = 12 diagonal