Question

a polynomial has n sides write an expression for the sum of all the interior angles of a polynomial ​

Answer 1

Answer:

Step-by-step explanation:

From any one of the vertices, say A1, construct diagonals to other vertices.

 

There are altogether (n-2) triangles.

 

Sum of angles of each triangle = 180°

 

Sum of interior angles of n-sided polygon

= (n-2) x 180°