Nilai y pada gambar adalah ....
a.16°
b.18°
c.19°
d.17°
a.16°
b.18°
c.19°
d.17°

Jawaban:
[tex] \tt = y + 3y + 2y + 66 \degree = 180 \degree \\ \tt = 6y + 66 \degree= 180 \degree \\ \tt = 6y = 180 \degree - 66 \degree \\ \tt = 6y = 114 \degree \\ \tt= y = \cancel \frac{114}{6} = \huge\boxed{ \tt19..}[/tex]
pilihan c(19°) adalah jawaban yang benar..
Garis dan Sudut
- Sudut pelurus => 180°
Maka:
66 + y + 3y + 2y = 180
66 + 6y = 180
6y = 180 - 66
6y = 114
y = 114/6
y = 19° (C.)
[answer.2.content]