Por favor ayudenme en estos problemas de GeometriaSon muy complicados para miLes doy 40 puntos?

1) En el triángulo de la izquierda <img src="https://tex.z-dn.net/?f=30%2B2%28%5Calpha%20%2B%5Ctheta%29%3D180%5C%5C%20%0A%5Calpha%20%2B%5Ctheta%3D75" />

2) ángulo exterior <img src="https://tex.z-dn.net/?f=%28x%2B70%29%2B%28%5Calpha%2B%5Ctheta%29%3D180%5C%5C%0Ax%2B70%2B75%3D180%5C%5C%20%5C%5C%0A%5Cboxed%7Bx%3D35%5C%C2%B0%7D" /> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

En el otro ejercicio, el origen de los rayos tiene un ángulo de 30°, por ende

1) .

<img src="https://tex.z-dn.net/?f=30%2B%5B180-%28%5Cbeta%2B2%5Ctheta%29%5D%2B%5B180-%28%5Ctheta%2B2%5Cbeta%29%5D%3D180%5C%5C%20%5C%5C%0A390-3%28%5Cbeta%2B%5Ctheta%29%3D180%5C%5C%20%5C%5C%0A3%28%5Cbeta%2B%5Ctheta%29%3D210%5C%5C%20%5C%5C%0A%5Cbeta%2B%5Ctheta%3D70%0A" />

2) <img src="https://tex.z-dn.net/?f=x%2B%5Cbeta%2B%5Ctheta%20%3D%20180%5C%5C%20%5C%5C%0Ax%2B70%3D180%5C%5C%20%5C%5C%0A%5Cboxed%7Bx%3D110%7D" />.