Draw a circle with centre O and radius $6$ cm . Mark points ABC such that

A lies on the circle.

B lies in the exterior of the circle.

C lies in the interior of the circle.

Using the correct symbol (=, > and <) fill in the boxes.

(a) $\mathrm{OA}\square 6\mathrm{cm}$.        (b) $\mathrm{OB} \square 6\mathrm{cm}$.          (c) $\mathrm{OC} \square 6\mathrm{cm}$

Draw a circle with centre O of radius $2.5$cm. Take any three points P, Q and  R on the circumference. Measure OP, OQ and OR. Write your conclusion in the form of a statement.

Draw circles of radii $3\mathrm{cm}, 4.5\mathrm{cm} \mathrm{and} 5.2\mathrm{cm}$ each having the same centre $O$. What is the name given to such circles?

Draw a circle with AB as diameter where AB = $6.4cm$

In the figure given below, PT is tangent to the circle with centre O and PQ is the diameter through P. PR and QR are chords of the circle. If $\angle R\mathrm{PT}=40°$, then find $\angle \mathrm{PQR}$

O is the center of the circle in each figure. Find the size of each lettered angle.

O is the centre of the circle. Find the value of $a$.

$O$ is the centre of the circle in figure. Find the size of each lettered angle.