I assume you mean "Heptagon", and yes it is.
heptgon
The definition of a irregular polygon is any polygon that is not a regular polygon.
A polygon is a Two dimensional figure that is closed.
Yes. A polygon is a closed figure.
If polygon X is inscribed in polygon Y, it means that all the vertices of polygon X lie on the sides of polygon Y. Additionally, polygon Y must have a shape that allows for polygon X to fit entirely within it, indicating that polygon Y is larger or has a suitable configuration to accommodate polygon X. This relationship often implies that the angles and side lengths of polygon X are influenced by the geometry of polygon Y.
heptgon
Not normally unless it's an irregular heptagon which can be constructed to have parallel sides
it seems to me that the only polygon of your description is a square
A type of polygon is a rhombusial polygon, trysectalnict polygon, and a equilateral polygon.
A triangle (not traingle) is a polygon. It can be a regular polygon but need not be.
an arrow is or isn't a polygon?
Polygon B is an octagon.
The definition of a irregular polygon is any polygon that is not a regular polygon.
An equilateral polygon is a polygon where the length of all the sides of the polygon are the same length.
Regular polygon Equilateral polygon Polygon with rotational symmetry
No, but a hexagon is a polygon.
A polygon is a Two dimensional figure that is closed.