besar sudut z adalah...
jawab pakai cara y thxx
jawab pakai cara y thxx
[tex]4y - 10° = 2y + 30° \\ 4y - 2y = 30° + 10° \\ 2y = 40° \\ y = \frac{40°}{2} = 20° \\ \\ z + 2y + 30° = 180° \\ z + 2.20° + 30° = 180° \\ z + 40° + 30° = 180° \\ z + 70° = 180° \\ z = 180°- 70° \\ z = 110° \: (c)[/tex]
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