No it is not.
false
Inly if the polygon has 3, 4 or 6 sides.
Regular Hexagon, Square, and Equilateral Triangle. (Apex)
An octagon can be used to create a tessellation, but an octagon cannot tessellate on its own.
A regular pentagon has no parallel lines, but you can create an irregular pentagon with one pair of parallel lines if you make a traditional 'house' shape with parallel 'walls'.
false
yes
Yes
Inly if the polygon has 3, 4 or 6 sides.
false
Assuming that the question refers to a regular octagon (not a regualr otagon), the answer is no.
No - because they would leave a small, square-shaped space between each tile.
Regular Hexagon, Square, and Equilateral Triangle. (Apex)
regular hexagon, square, equilateral triangle...apex
Suppose all the pentagon have two adjacent angles of 45 degrees, and three right angles. Create a line of pentagons with their bases aligned and their "odd" vertext facing upwards. Next create a second line of pentagons, inverted so as to meet the first line apex-to-apex. The gaps between these will be rectangular (square, in fact). It is thus possible to obtain a tessellation. No tesselation is possible with regular pentagons and rectangles.
regular hexagon
The only shapes which can be used for a regular tessellation are:An equilateral triangle,A squareA regular hexagon.There are also non-regular polygons as well as shapes which are not polygons which can tessellate