Question

Please help. What is the SUM of the angle measures in a nonagon (9 sides)?1080°1260°1440°900°

Answer 1

The sum of angles in a polygon is given as

`(n-2)*180`

Where the number of sides is n

Since n=9, this gives

`\begin{gathered} (9-2)*180 \\ =7*180 \\ =1260^0 \end{gathered}`

The sum of the angle of measures in a nonagon is 1260 degrees