In the following figure, z is the image of point x with respect to the line CD . State the relation between line segment ZF and XF.

  

In the following figure, point E is the image of point F in the line CD and EH intersects the CD as point Q.

State whether the image of the point Q in the line CD is the point Q itself.

In the following figure, point E is the image of point F in the line CD and EH intersects the CD as point Q.

Verify whether: $\mathrm{QH}=\mathrm{QF}$

In the following figure, point E is the image of point F in the line CD and EH intersects the CD as point Q.

Verify whether: $\mathrm{QH}+\mathrm{QF}=\mathrm{QE}+\mathrm{QH}$

A circle has _____ lines of symmetry.

Total number of capital letters which have vertical lines of symmetry is _____.

The total number of digits (from $1 to 9$) with no line of symmetry is _____.

A right-angled isosceles triangle has _____ line of symmetry.

The number of letters of the words 'TOO HAPPY' which have no line of symmetry is _____.