yes
* * * * *
No, they do not tessellate.
No, a semicircle cannot tessellate on its own because it does not fill space without leaving gaps. When arranged, semicircles can create patterns, but they will always result in empty spaces where the curves do not meet. For a shape to tessellate, it must be able to completely cover a plane without overlaps or gaps, which semicircles cannot achieve alone.
No cones can not tessellate.
Yes * * * * * No. A star will not tessellate.
A square will tessellate leaving no gaps or overlaps but a circle does not tessellate.
No, it can't be tessellate.
Yes a quadrilateral will tessellate.
yes... this figure does tessellate
No, but an octagon and a square can tessellate.
Tessellate is a verb. You were correct
No, there is no polygon with 7 or more sides can tessellate.
No it does not tessellate you have to pentagons in order for it to tessellate. * * * * * It is not at all clear what "have to pentagons" has to do with this. No polygon with 7 or more sides will tessellate. Octagons will tessellate if mixed with squares but that is not "proper" tessellation since it involved more than one shape.
No not all shapes tessellate.