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.
7
A heptagon can have 0, 1 or 7 lines of symmetry. 7 only if it is a regular heptagon.
A triangle can have no parallel lines.
A pentagon has no parallel lines.
A cube has exactly 6 parallel lines.
A cube has exactly 6 parallel lines.
2
None.
7
No, only 1 parallel line
There is no such shape. There is a heptagon (7-sides) or an octagon (8 sides) but not hectogen!
A regular heptagon has no parallel sides.
You can have 0, 1, 2, or 3 pairs of parallel sides in a heptagon.
A heptagon can have 0, 1 or 7 lines of symmetry. 7 only if it is a regular heptagon.
No, a heptagon cannot be parallel but two heptagons can.A heptagon can be concave.
None.
None.
A heptagon can have all 7 lines that are perpendicular to one or both its neighbours.