nilai ( 2x + y + 2 ) berdasarkan gambar

Sudut - Sudut Berelasi

180 - 120 = 60
180 - 150 = 30

60 + 30 + z = 180
90 + z = 180
z = 90

3x = 60
x = 20
2y = 30
y = 15

2x + y + 2 =
40 + 15 + 2
67