Circles

How to find the circumference of a circle?

If the area of semi circular plot is $11088 m^2$, then it's perimeter is?

Two tyres A and B are with diameter $\frac{1}{2}\mathrm{m}$ and $\frac{1}{4}\mathrm{m}$. Find the distance covered by tyres in one complete round.

The difference between the circumference and diameter of a circular park is $300 \mathrm{m}$ a car goes around the park in exactly a minute what is the speed of the car in kilometre per hour?

Sudhanshu divides a circular disc of radius $7 \mathrm{cm}$ in two equal parts. What is the perimeter of each semicircular shape disc?

Consider an equilateral triangle with side $3 \mathrm{cm}$. If an insect runs around the triangle in such a way that it is always at a distance of $1 \mathrm{cm}$ from the sides of triangle, then how much distance will it travel?

What is the value of pie.

What is the relationship between circumference and area of a circle?

If the radius of the circle is $7.2 cm$ and area of the circle is $a c{m}^2$, then find the value of $a$.$\left(take \mathrm{\pi }=\frac{22}{7}\right)$

The radii of the inner and outer circumferences of two concentric circle is  $21 m$ and $14 m$ respectively . The area of the region of two concentric circles is _____$m^2$.

Why the area of semi circle is half of the circle?

If the area of circle is $a c{m}^2$ and diameter of circle is $28$, then find the value of $a$. $\left(take \pi =\frac{22}{7}\right)$

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

The ratio of the circumference and the _____ of a circle is always constant and it is denoted by $\mathrm{\pi }$.

The value of _____remains the same irrespective of the size of the circle.

When we multiply the pi by the square of the radius of a circle, then we get_____ of a circle

Pi is define as the ratio the circumference of the circle to its diameter.

Approximate value of pi is

The radius of the circle with an area $36\pi c{m}^2$ is _____

The ratio of the circumference of two circles is $4 : 1$. Find the ratio of their areas.