(20 POINTS, PLEASEEE HELP THIS IS DUE IN AN HOUR) Given the diagram pictured to the right, prove that
Angle x + angle y + angle z = 180°
![20 POINTS PLEASEEE HELP THIS IS DUE IN AN HOUR Given the diagram pictured to the right prove that Angle x angle y angle z 180 class=](https://us-static.z-dn.net/files/df1/b7ef579f82c77104ae4953b59699d439.png)