Fill in the blanks to make the statements true.

A quadrilateral in which a pair of opposite sides is parallel is _____.

Fill in the blanks to make the statements true.

The sum of all exterior angles of a polygon is _______.

Fill in the blanks to make the statements true.

_______ is a regular quadrilateral.

Fill in the blanks to make the statements true.

If all sides of a quadrilateral are equal, it is a ________.

Fill in the blanks to make the statements true.

In a rhombus diagonal intersect at _______ angles.