No it can't
No, it is not possible.
yes
Assuming that the question refers to a regular octagon (not a regualr otagon), the answer is no.
A regular pentagon is one example.
commonly used tessellation shapes
An octagon can be used to create a tessellation, but an octagon cannot tessellate on its own.
No, it is not possible.
square
false, there would be gaps.
Triangle :)
Triangle :)
yes
Yes, any quadrilateral can be used.
No Internat angle of a regular octagon is 135°. No multiple of 135° will make 360°. Thus at any point there can be at most two octagons and a 90° gap. Ratty
true
An octagon cannot tessellate because when you put about 4 together, there are gaps in between the shapes, which is not allowed in a tessellation. When you put together 5 octagon's, some of them are overlapping and there still are gaps. Therefore, an octagon cant tessellate.
Yes, they will.