The sum of the interior angles of a polygon is given by:
![\text{Sum}=(n-2)*180](https://img.qammunity.org/2023/formulas/mathematics/college/qny4z4qdz0pw58p71fu6lc0yiq81lhwl91.png)
Where n is the number of sides of the polygon.
A regular 30-gon has 30 sides, then the sum is:
![\begin{gathered} \text{Sum}=(30-2)*180 \\ \text{Sum}=28*180 \\ \text{Sum}=5040 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/6nlcke4fmwa4nh9l8p7rti731ai9ano28r.png)
Now, we have to divide the total sum by the number of angles, then:
![(5040)/(30)=168](https://img.qammunity.org/2023/formulas/mathematics/college/ij99skuv7nr0l4pgbbto7mqa3zvx4dgmmo.png)
Answer: One interior angle of a regular 30-gon measures 168°.