A cyclic polygon.
it is called a trapazoid. I asked my math teacher just for this reason!
Inscribed angle
it is arc angle
An inscribed angle is an angle whose vertex is on the circle and whose sides are chords.
It is an inscribed angle.
central angle
An inscribed angle.
Inscribed Polygon
Inscribed polygon, since it is inside the circle.
A regular polygon
A regular polygon
A circumscribed polygon is a polygon all of whose vertices are on the circumference of a circle. The circle is called the circumscribing circle and the radius of the circle is the circumradius of the polygon.