Circle and its Drawing

The diameter of a circle if its radius is $7 \mathrm{cm}$ is $P \mathrm{cm}$, then the value of $P$ is

The diameter of a circle if its radius is $5 \mathrm{cm}$ is $P \mathrm{cm}$, then the value of $P$ is

The value of Pi ($\mathrm{\pi }$) is the ratio of the circumference of a circle to its _____.

 A boy walks around a circle which has a diameter of $100 \mathrm{m}$, how far the boy has walked?

The diameter of the wheel of a car is $70 \mathrm{cm}$. How many revolutions will it make to travel $1.65 \mathrm{km}$?

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 centre $O$ and radius $6 \mathrm{cm}$. Mark points $P,Q,R$ such that
$\left(i\right)$ $P$ lies on the circle.
$\left(ii\right)$$Q$ lies in the interior of the circle.
$\left(iii\right)$$R$ lies in the exterior of the circle.
Complete the following statements using the correct symbol:
$OP$ _____ $\mathrm{cm}$.

What is the longest chord of a circle?

If the radius of the circle is increased by $2$ times, then the diameter is increased by _____ times.

Is $\mathrm{XY}=2 \mathrm{OZ}$?

In the below table find the value of $x+y.$ $($Use $\mathrm{\pi }=\frac{22}{7})$

The point _____ is a point on the circle.

In the adjoining figure, $O$ is the centre of the circle. $CADBLC$ is the _____ of the circle.

The approximate value of $\mathrm{\pi }$, correct to two decimal places is _____.

Find the diameter of a circle if the radius is $11$ cm. If the answer is $K cm$ , then write the value of $K$ in the answer box.

Find the diameter of a circle if the radius is $6$ cm. If the answer is $K cm$ , then write the value of $K$ in the answer box.

Find the radius of a circle whose diameter is $10$ cm. If the answer is $K cm$ then write the value of $K$ in the answer box.

Find the radius of a circle whose diameter is $16$ cm. If the answer is $K cm$ then write the value of $K$ in the answer box.

Find the diameter of a circle if the radius is $4$ cm. If the answer is $K cm$ , then write the value of $K$ in the answer box.

Diameter of a circle is _____ $\times$ radius.