None.
There is nothing in the question that requires the polygon to be regular and it is difficult to define a radius, in any meaningful way, for an irregular shape.
They are both shapes and both have 4 sides.
There is no river between Rome and Carthage. The two cities are on opposite sides of the Mediterranean Sea.
The time of year, which puts us on opposite sides of the sun.
As they are on different sides of the Mediterranean Sea, it had to be boat.
three sides
Heptadecagon.
Heptadecagon
A heptadecagon.
Heptadecagon, or Heptakaidecagon
A heptadecagon has 17 sides. The prefix "hepta-" refers to seven, and "deca-" refers to ten, combining to indicate 17. It's a polygon that can be classified as regular if all its sides and angles are equal.
Heptadecagon, or also known as Heptakaidecagon.
A 17 Sided Polygon is called Heptadecagon.
The regular polygon of 17 sides is called the heptadecagon, or sometimes the heptakaidecagon.
the radius
A polygon with 17 sides is called a heptadecagon or heptakaidecagon.(see related link for list)
They are both quadrilaterals because they have 4 sides
Hendecagon has 11 sides,dodecagon has 12 sides,triskaidecagon has 13 sides,tetradecagon has 14 sides,pentadecagon has 15 sides,hexadecagon has 16 sides,17 sides is heptadecagon,octadecagon have 18 sides,enneadecagon has 19 sides,20 sides is called as icosagon. The prefix of that 9 polygons is Greek. A polygone with 4 sides is called a quadrilateral.