If the four vertices of a quadrilateral lie on the circumference of a circle , then it is called a `………….`quadrilateral.

Number of vertices of a quadrilateral is …………….

The sum of four angles of a quadrilateral is

If 4 sides of a quadrilateral ABCD are tangents to a circle, then

The opposite vertices of the quadrilateral PQRS are

The vertex of angle in circle does not always lie on the circumference of the circle.

If the diagonals of a cyclic quadrilateral intersect at the centre of a circle , then the quadrilateral is "_______________" .

Sum of the four angles of a quadrilateral is the four right angles.

Find the perimeter of the quadrilateral that circumscribes this circle.