Draw any polygon and divide it into triangular parts. Work out the sum of interior angles of the polygon.

Explanation

To solve the problem of finding the sum of the interior angles of a polygon, let's follow these steps:

### Step 1: Draw a Polygon
- Draw a polygon with 5 sides (a pentagon). Label the vertices as A, B, C, D, and E.

### Step 2: Divide the Polygon into Triangles
- To divide the polygon into triangles, draw diagonals from one vertex to the non-adjacent vertices. For example, draw diagonals from vertex A to vertices C and D. This will create three triangles:
- Triangle ABC
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