Answer:
[tex]30[/tex]
Step-by-step explanation:
100 degrees is an exterior angle. The angle next to it is 80 degrees.
Why? Because they add up to 180 degrees.
Now we have the following equation:
x+70+80=180
x+70=100
x=100-70
x=30
Hope it's correct! please mark Brainliest if it does!
