A scalene triangle has

1. no line of symmetry
2. one line of symmetry
3. two lines of symmetry
4. three lines of symmetry

The lines of symmetry of a rhombus are

1. perpendicular bisector of each of its sides
2. its two diagonals
3. the lines joining the mid points of its opposite sides
4. its sides

The line of symmetry of a rectangle are

1. its four sides
2. its two diagonals
3. the bisectors of its four interior angles
4. the lines joining the midpoints of its opposite sides.

ABCD is a kite in which AB = AD and CB = CD. The kite is symmetrical about

1. the diagonal AC
2. the diagonal BD
3. both the diagonals AC and BD
4. the lines joining the mid-points of its opposite sides.