NA

Find $\angle A+\angle B+\angle C+\angle D+\angle E$

Draw a irregular convex polygon.

Draw a regular concave polygon.

Draw an irregular concave polygon.

A polygon is said to be _____ if all of its sides are of equal length and all of its angles are of equal measures. 

The interior angle of a regular polygon exceeds the exterior angle by $140°$. The number of sides of the polygon is:

A regular hexagon is of side $14 \mathrm{cm}$, if a circle is inscribed in the hexagon, then radius of the circle is?

The number of exterior angles are _____ to the number of sides of a regular polygon. (double/ equivalent)