No because its angles are not factors of 360 degrees
No.
No.
No
Yes. A simple case would be where they combine into a square.
no it can not i have research it thoroughly i could not find any pictures of a regular decagon tessellated. i did but they all had different shapes so the answer is no it is not logically possible
A regular octagon will not tessellate but an irregular one can.
the exterior of a regular pentagon is? the exterior of a regular pentagon is?
A pentagon can be regular, or irregular.
Yes. A regular tessellation can be created from either an equilateral triangle, a square, or a hexagon.
A regular pentagon is both equiangular and equilateral.
In a normal plane, only regular polygons with interior angles that are a factor of 360o can be tessellated. This means only three shapes: the regular (equilateral) triangle, the regular quadrilateral (square) and the regular hexagon. If the line were considered a regular polygon (with only two sides) then it would also be included in this list.
A pentagon can be regular or irregular.