Question

If sum of all interior and exterior angles of a polygon is 1800°, find the
number of sides​

Answer 1

Answer:

12 sides.

Step-by-step explanation:

All polygons can be divided up into triangles by joining one vertex to all of the other vertices.

The number of triangles is always two less than the number of sides.

If you know the number of triangles you add  2 to find the number of sides.  

Every triangle has  180°

Number of triangles: $\frac{1800}{180}$=10  triangles

Number of sides:  10 + 2 = 12  sides

Hope it helps...

Thank You...<3<3