**Radius of the circle**

A line segment having one end point on the circumference of the circle and other end point at the center of the circle is called the radius of the circle.

Here, OA is the radius of the circle

**Circumference of the circle**

Circumference of a circle is the measure of the length of the circle.

**Circumference of the circle = 2πr **

### Find Radius from Circumference?

**Question 1**

Find the radius of the circle whose circumference is 176 cm?

**Explanation**

Let, the radius of the given circle be r cm

As we know that,

Circumference of the circle = 2πr cm

Given,

Circumference of a circle = 176cm

2πr = 176 (from above)

r =

r =

r = 28cm

Hence, the radius of the circle = 28cm

**Question 2**

Find the radius of the circle whose circumference is 440 cm?

**Explanation**

Let, the radius of the given circle be r cm

As we know that,

Circumference of the circle = 2πr cm

Given,

Circumference of a circle = 440cm

2πr = 440 (from above)

r =

r =

r = 70cm

Hence, the radius of the circle = 70cm

**Learn More…**

**Perimeter of Rectangle**

**Perimeter of Square**

**Perimeter of Triangle**

**Perimeter of Equilateral Triangle**

**Perimeter of regular pentagon**

**Perimeter of regular octagon**

**Perimeter of regular decagon**

**Area of Rectangle**

**Area of Square
Circumference of a Circle
**

**Finding Diameter of a circle when circumference is given**

**Finding Perimeter of Rectangle when Area & Breadth given**

**Finding Perimeter of Rectangle when Area & Length given**

**Find the dimensions of a rectangle**

**Find the cost of fencing of a rectangular field**

**Find the cost of carpeting the room**