tolong di jawab cepat no 27

< BCF +<FCG=180°
3x°-45°+x°+23°=180°
4x°-22°=180°
4x°=180°+22°
4x°=202°
x°=202°/4°
x°=50,5°

Dit:
< BCF =3x°-45°
=3(50,5)°-45°
=151,5°-45°
=106,5

semoga membantu...
maaf klo salah