Yes, all of the radii in a single circle are congruent.
Yes. The corners must be right angles for it to be inscribed on the circle.
Yes, providing that the radii are all in the same circle
Yes providing that they are in the same circle
Yes, providing it is the same circle.
Yes, it is.
yes there is i will give you it press up down L1 R1 right left circle up down right circle circle left it will work
Yes
Yes, providing that each radius is in the same circle
yes
yes.
Yes. A circle is defined as the set of all points in a plane equidistant from a given point (the center of the circle) - hence - all points of a circle must be co-planar by definition.