Question

What is the angle sum of a polygon with number of sides 9 ?​

Answer 1

Answer:

So the interior angle of a 9 -sided polygon is 140 ° . We can see that x and one interior angle lie on the same side of a straight line, so their sum must be 180 ° .

...

Solve the Question.

Interior Angle of a Polygon = 180 ° · Number of Triangles Number of Vertices

Interior Angle of a Polygon = 9 · 20 ° · 7 9

Answer 2

Answer:

hey friend here your answer hope it helps