**Definition:**

A chord is the line joining any 2 points on the circle.

In the figure, AB,CD,EF are chords.

**Property 1:**

The line joining the midpoint of a chord and the centre of the circle is perpendicular to the chord.

**OR**

The perpendicular bisector of any chord passes through the center.

**OR**

The perpendicular dropped from the centre of the circle to any chord will bisect the chord.

The mid points of all the chords of equal length will form a circle with the center same as the original circle.

Distance of the chord from the centre of the circle = root(r*r - s*s/4)