True
It is eight
There are eight lines of symmetry.
Octagonoctagon
13 sides: Triskaidecagon14 sides: Tetrakaidecagon15 sides: Pentakaidecagon16 sides: Hexakaidecagon17 sides: Heptakaidecagon18 sides: Octakaidecagon19 sides: Enneakaidecagon20 sides: Icosagon
No.
true
True
True
A regular octagon will not tessellate - the 'spaces' left over are squares.
True
Yes, it is true.
If the octagon is a regular octagon (all eight sides and all eight angles are equal), then it is a regular polygon. If it is not a regular octagon (i.e. if it is an irregular octagon) then is it an irregular polygon.
No
A regular octagon can tessellate the plane when combined with regular squares. By placing a square in the center of the octagon and surrounding it with eight octagons, the shapes can be repeated infinitely, filling the plane without gaps or overlaps
All eight sided polygons are known as "octagons". Octagons that have all side lengths the same are known as "regular octagons".
an octogon is the only polygon that has eight sides