Fill in the blanks:

(i) A quadrilateral has ……………..sides.

(ii) A quadrilateral has……………. angles.

(iii) A quadrilateral has……………. vertices, no three of which are……………..

(iv) A quadrilateral has ……………..diagonals.

(v) A diagonal of a quadrilateral is a line segment that joins two………………. vertices of the quadrilateral.

(vi) The sum of the angles of a quadrilateral is ………………..