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.

In △ABC, AB = AC and AD ⊥ BC, BE ⊥ CA and CF ⊥ AB. Then, △ABC is symmetrical about

1. AD
2. BE
3. CF
4. BC

Which of the following letters of the English alphabet does not possess a point symmetry?

1. C
2. N
3. S
4. X

An equilateral triangle has a rotational symmetry of the order

1. 1
2. 2
3. 3
4. 4