Which of the following is a correct statement?
1
Equal chords are equidistant from the centre of the circle but not always subtend equal angle at centre of the circle
2
If two circles touch each other, the point of contact lies on the line joining the two centres.
3
Angles subtended by the arc in the same segment of the circle are in ratio of 2 : 1.
4
The sum of the angles of a cyclic quadrilateral is always 180º.