Mathematics

Problem

In a circle with centre

O

and radius

6\,\text{cm}

, chord

AB

subtends an angle of

60^{\circ}

at the centre. What is the length of

AB

? a)

6\sqrt{3}\,\text{cm}

6\,\text{cm}

2\pi\,\text{cm}

3\,\text{cm}