Name four objects that are circular in shape.

A figure is given below identify the centre.

A figure is given below. Identify the radius containing the point $\mathrm{Y}$.

A figure is given below, identify the diameter.

A figure is given below. Identify the shortest chord.

A figure is given below. Identify the following
A greater arc with shaded segment

A figure is given below. Identify the minor segment

A figure is given below. Identify the minor sector. $\left(OLRPO/OLSP\right)$

A figure is given below. Identify the following. 
Lower Semicircle