Answer: [tex]160^{0}[/tex]
Step-by-step explanation:
The first thing is to find the sum of angles in a 18-gon using the formula:
[tex](n-2)180[/tex]
That is
[tex](18-2)180[/tex]
= 16 x 180
= [tex]2880^{0}[/tex]
Since it is a regular 18-gon , this means that each interior angles are equal , so the measure of each interior angle will be :
2880/18
= [tex]160^{0}[/tex]
