Construction of an Incircle for a Regular Hexagon

Q. Inradius of a regular hexagon of sides 6 cm =

1. $2\sqrt{3}cm$
2. $3\sqrt{3}cm$
3. $3\sqrt{2}cm$
4. $3cm$

Q. ABCDEF is a regular hexagon of side 12cm.Then find the following and match it.

1. 12cm
2. 24cm
3. $6\sqrt{3}$ cm
4. ${120}^{\circ }$