12. Find the chord length

1. Let \(O\) be the centre of the circle and \(AB\) be its chord. A line from \(O\) cuts the chord \(AB\) at \(C\) such that \(\angle OCB\) \(= 90^{\circ}\). If \(AC\) \(=\) 18 \(cm\). Find the length of the chord.

 

Answer:

 

The length of the chord \(AB\) is  \(cm\).

 

 

2. If the radius of the circle is 5 \(cm\) and the perpendicular distance from the centre to the chord is 4 \(cm\), then find the length of the chord.

 

Answer:

 

The length of the chord is  \(cm\).