Mathematics

Problem

In a circle, the perpendicular from the centre

O

to chord

AB

meets

AB

M

. If

AB = 8\,\text{cm}

and

OM = 3\,\text{cm}

, the radius of the circle is a)

7\,\text{cm}

4\,\text{cm}

5\,\text{cm}

6\,\text{cm}