Yes.
The sum of opposite angles is 180 degrees and that is a necessary and sufficient condition for a quadrilateral to be cyclic.
Chat with our AI personalities
Yes.
Yes, every subgroup of a cyclic group is cyclic because every subgroup is a group.
every abelian group is not cyclic. e.g, set of (Q,+) it is an abelian group but not cyclic.
Only if it is a square.
No. In fact, a rhombus cannot be cyclic - unless it is a square.