jawab + cara ya please

a)
68 + a + a = 180
2a = 180 - 68
a = 112/2 = 56 derajat

5b + 12 + 2b = 180
7b = 180 - 12
b = 168/7 = 24 derajat

b)
sudut DEG = 68 + 56 = 124 derajat
sudut KLN = 5(24) + 12 = 120 + 12 = 132 derajat

smoga membantu