It the UK the mint does: the British 50 pence and 20 p coins are both heptagonal.
All seven sided polygons are known as "heptagons". Heptagons that have all side lengths the same are known as "regular heptagons".
7
no
They can if they are regular.
Yes.
Not regular heptagons.
25
For two 7 sided regular heptagons to be congruent they must be identical in shape and size.
They are called heptagons.
Heptagons have seven sides.
Septagons or heptagons are 7 sided polygons
900 degrees