Question

find the circumference of a circle whose radius is 2.1CM​

Answer 1

Given :-

• Radius of circle = 2.1 cm

To find:- Circumference of circle

SolutioN:-

♰ Circumference of circle = 2πr

In which :- r is radius

Now put the value of r in formula.

➟ 2 × 3.14 × 2.1

➟ 13. 188 cm

❝ Hence,Circumference of circle is 13.188cm.❞

___________________

More information:-

• Area of circle is πr²

Answer 2

Given ,

Radius of circle (r) = 2.1 cm

We know that , the circumference of circle is given by

Circumference = 2πr

Thus ,

Circumference = 2 × 22/7 × 2.1

Circumference = 44 × 0.3

Circumference = 13.2 cm

$\therefore$ The circumference of a circle is 13.2 cm