Question

find the circumference of a circle of radius 21 cm​

Answer 1

Answer:

132cm

Step-by-step explanation:

Circumference of Circle= 2πr

Since, it is given that radius is 21cm..

Therefore

Circumference= 2πr

=2*π*21

=42*22/7

=132

Hence, Circumference is 132 cm

Answer 2

Answer :-

• 132 cm

Given :-

• Radius of circle = 21 cm

To Find :-

• Circumference of a circle = ?

Explanation :-

As we know, the circumference of a circle means " Circumference of a circle is defined as the enclosing boundary of a curved geometrical figure called a circle. "

$\underline { \boxed { \bf \implies Circumference \; of \; circle = 2 \pi r }}$

Now, Substituting the values,

$\rm \implies Circumference \; of \; circle = 2 \pi r$

$\rm \implies (2 \times \dfrac{22}{7} \times 21) \; cm$

$\rm \implies (\dfrac{44}{7} \times 21) \; cm$

$\rm \implies (\dfrac{924}{7}) \; cm$

$\underline { \boxed { \bf \implies 132 \; cm }}$

Hence, the circumference of the circle is 132 cm

@Agamsain