Question

Identify the following parts of a circle in the adjoining figure : Radius

Answer 1

Radius of the circle : It is distance from the centre of the circle to any point on its circumference (boundary) . It is usually denoted by $\mathrm{r}\mathrm{or}\mathrm{R}$

Hence, from the figure we can conclude that $\text{OA,OD,OB}$ are the radii of the circle .