Question

Find the circumference of the circle whose radius is 12cm

Answer 1

Answer:

75.36 cm^2

Step-by-step explanation:

r = 12 cm

C = 2πr

   = 2 × 12 × 3.14

   = 24 × 3.14

   = 75.36 cm^2

So, the answer is 75.36 cm^2 or centimeter square

Answer 2

• The circumference of the circle = 75.4 cm.

Given :

• The radius of the circle = 12 cm.

To Find :

• The circumference of the circle.

Solution :

We have to find the circumference of the circle.

We know that,

$\underline{ \boxed{ \blue{ \bf{Circumference \: \: Of \: \: Circle = 2\pi r}}}}$

Where,

• π = 22 / 7.
• r = Radius = 12 cm.

Now, substitute both the values (value of π and r) in the formula of circumference of the circle.

$: \implies \bf { 2 \times \dfrac{22}{7} \times 12 \: \: cm } \\ \\ \\ : \implies \bf { \dfrac{2}{1} \times \dfrac{22}{7} \times \dfrac{12}{1} \: \: cm } \\ \\ \\ : \implies \bf \dfrac{2 \times 22 \times 12}{1 \times 7 \times 1 \: \: cm} \\ \\ \\ : \implies \bf{ \dfrac{44 \times 12}{7} \: \: cm } \\ \\ \\ : \implies \bf { \dfrac{528}{7} \: \: cm } \\ \\ \\ : \implies \bf {75.4 \: \: cm} \qquad \qquad{(approx.)} \\ \\ \\ \: \: \bf \therefore \: \: Circumference = 75.4 \: cm$

Hence,

The circumference of the circle is 75.4 cm.

______________________________

Additional Information :

Some formulas of the circle :-

1) Area of the circle = πr² OR π × radius².

2) Circumference of the circle = 2πr OR 2 × π × radius.

3) Diameter of the circle = 2r OR 2 × radius.

4) Radius of the circle = D / 2 OR Diameter / 2.

Where,

• r = radius.
• D = diameter.