None
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.
Two lines tangent to a circle at the endpoints of its diameter are parallel. See related link for proof.
Parallel lines within a circle are infinite.
a semi - circle has zero parallel lines
None.
No, parallel lines are straight lines.
a circle
no
No. The circular shape makes it impossible to have parallel lines just as you cannot have parallel lines in a circle that both reach the length of the diameter of the said circle.
circle
Cdm
latitude
The imaginary parallel lines that circle the earth are called "Latitudes".
The Equator, the Antarctic Circle, and all other lines of latitude.