The line joining any two points in a concave quadrilateral always lies inside the quadrilateral.

A quadrilateral has only two pairs of adjacent sides.

Which of the following is not a pair of adjacent angles of quadrilateral $ABCD$ ?

In the quadrilateral $PQRS$, the part $PR$ is known as a

A quadrilateral has

A cricket ground is in the shape of a quadrilateral. If a batsman hits a four, then the ball has to touch a point

What shape is a full moon?

What shape are the wheels of the scooter?

In the adjoining figure, by using centre $O$, write three radii.