Notice that the irregular polygon has 6 sides. Then, we can use the formula for calculating the sum of interior angles:
![S=180(n-2)](https://img.qammunity.org/2023/formulas/mathematics/college/9xptguzr71nh2a5qmqdf9g509y35kakaj4.png)
in this case,n = 6, then:
![\begin{gathered} S=180(6-2)=180(4)=720 \\ S=720\degree \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/6zl7r2vg9do93o039kjzxygjmj057m1erj.png)
now that we have that the sum of the interior angles equals 720 degrees, we can find the value of angle x:
![\begin{gathered} 98+90+155+112+140+x=720 \\ \Rightarrow595+x=720 \\ \Rightarrow x=720-595=125 \\ x=125\degree \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/vt9m0q2eh8o8s3hu49bpdp1dpr36i437d3.png)
therefore, the measure of angle x is 125 degrees