Geometry: These are all true or false questions

1.) The diagonals of a rectangle are perpendicular.

2.) The opposite angles of a rhombus are equal.

3.) The diagonals of a rhombus are perpendicular.

4.) Every quadrilateral is a parallelogram.

5.) No parallelogram is a rhombus.

6.) Every parallelogram is a rhombus.

7.) Every square is a parallelogram.

8.) Every square is a rectangle.

9.) Every square is a rhombus.