Yes. The sum of opposite angles is 180 degrees and that is a necessary and sufficient condition for a quadrilateral to be cyclic.
A square or a rectangle
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.
Yes because they are 4 sided shapes
Square
Yes. The sum of opposite angles is 180 degrees and that is a necessary and sufficient condition for a quadrilateral to be cyclic.
A square or a rectangle
Yes, every subgroup of a cyclic group is cyclic because every subgroup is a group.
a square
every abelian group is not cyclic. e.g, set of (Q,+) it is an abelian group but not cyclic.
rectangle,square,circle,quadilateral
a closed figure with 4 sidesA square or any shape with 4 lateral sides.
A square and a rectangle have diagonals of equal lengths
Only if it is a square.
No. In fact, a rhombus cannot be cyclic - unless it is a square.