None.
7
None.
It looks as if the cursor has played tricks and changed the wording from a regular heptagon to regagonular hept. A regular heptagon has no parallel sides.
A heptagon has seven sides, so a regular heptagon has seven lines of symmetry (they run from each vertex to the middle of the opposite side).
There is no such shape. There is a heptagon (7-sides) or an octagon (8 sides) but not hectogen!
2
A heptagon contains zero parallel lines. All of the lines in a regular heptagon with all sides and angles equal are at different angles from each other.
A regular heptagon has no parallel sides.
7
None.
A heptagon can have 0, 1 or 7 lines of symmetry. 7 only if it is a regular heptagon.
It looks as if the cursor has played tricks and changed the wording from a regular heptagon to regagonular hept. A regular heptagon has no parallel sides.
3
In a regular heptagon, there are 7 lines of symmetry because there is one line of symmetry for every side.
A regular pentagon has no parallel lines.
A regular octagon has four pairs of parallel lines.
A heptagon has seven sides, so a regular heptagon has seven lines of symmetry (they run from each vertex to the middle of the opposite side).