seven
Nothing. Though a heptagon is a plane figure bounded by seven straight lines.
a Heptagon has 7 sides and 7 angles.
An heptagon has 7 sides and a triangle has 3 sides
A heptegon or a septegon.
The correct spelling is "heptagon" (7-sided figure).
it does not matter how many lines
it does not matter how many lines
How many lines of symmetry does a rectangle have
4
There are no real lines. But conceptually there are infinitely many.
it depends how many spokes it has
Infinitely many. There are infinitely many lines from the apex to the base. Every point on each of these lines is on the surface of the cone.