Question

Nilai (2×+y+z) berdasarkan gambat diatas?

Answer 1

120 + 3x = 180
3x = 60
x = 20 derajat

150 + 2y = 180
2y = 30
y = 15 derajat

3x + z + 2y = 180
3(20) + z + 2(15) = 180
60 + z + 30 = 180
90 + z = 180
z = 90 derajat

jadi (2x + y + z)
= 2(20) + 15 + 90
= 40 + 15 + 90
= 145 derajat (C)