Answer:
A 2-dimension closed figures with a number of sides is called Polygon.
If it has 7 sides it is called Heptagon,
If it has 12 sides it is called Dodecagon,
If it has 6 sides it is called Hexagon,
If it has 10 sides it is called Decagon,
If it has 8 sides it is called octagon,
If it has 5 sides it is called Pentagon,
Since, First figure has 6 sides therefore, it is a hexagon,
While, Second figure has 12 sides therefore, why it is a Dodecagon,
And, Third figure has 10 sides therefore, it is a Decagon.
