An octagon with 8 sides.
Pentagon.
It is a pentagon which has 5 sides
a pentagon, hexagon, octogon,e.c.t.
A hexagon and a triangle.
It is a hexagon.
A quadrilateral has 4 sides anda hexagon has 6 sides. So the polygon between them is the one that has 5 sides. That is the pentagon.
An octagon with 8 sides.
A hexagon has 6 sides so it would be any other polygon greater than 6 sides
A quadrilateral, pentagon or hexagon.
Pentagon.
It is a pentagon which has 5 sides
a pentagon, hexagon, octogon,e.c.t.
a hexagon ( triangle has 3 and a hexagon has 6)
How about: pentagon, hexagon, heptagon, octagon .... etc
hexagon
A hexagon and a triangle.