Number 30 please it’s related to number 29 and the answer for 29 was x= 40

Given
To find the measure of ∠CGB.
Explanation:
It is given that,
That implies,
[tex]\angle CGB=x+80[/tex]Since x=40°.
Then,
[tex]\begin{gathered} \angle CGB=40+80 \\ =120\degree \end{gathered}[/tex]Hence, the measure of ∠CGB is 120°.