TOLONG JAWAB YAYang bener ​

Jawaban:

B. 132°

Penjelasan dengan langkah-langkah:

12x+108°=180°

12x=72°

x=6°

4z+12x+56°=180°

4z+72+56=180°

4z=52°

z=13°

5x+2y+56°=180°

5.6+2y+56°=180°

30°+2y+56°=180

2y=94°

y=47°

2x+2y+2z

2.6+2.47+2.13

12+94+26

132°