Question

Find the Area and circumference of circle whose radius is 4cm.​

Answer 1

Answer:

area = π r.r

3.14 ×4×4cm.cm

circumference =2πr

2×3.14×4

hope it helps you .

convert 4cm in mt if necessary.

Answer 2

Given :

• Radius of circle = 4cm

To Find :

• Area and Circumferenec of Circle.

Solution :

$\longmapsto\tt{Radius=4cm}$

Using Formula :

$\longmapsto\tt\boxed{Circumference\:of\:Circle=2\pi{r}}$

Putting Values :

$\longmapsto\tt{2\times\dfrac{22}{7}\times{4}}$

$\longmapsto\tt{\cancel\dfrac{176}{7}}$

$\longmapsto\tt\bold{25.1{cm}^{2}}$

So , The Circumference of Circle is 25.1cm²...

_______________________

For Area :-

Using Formula :

$\longmapsto\tt\boxed{Area\:of\:Circle=\pi{{r}^{2}}}$

Putting Values :

$\longmapsto\tt{\dfrac{22}{7}\times{4}\times{4}}$

$\longmapsto\tt{\cancel\dfrac{352}{7}}$

$\longmapsto\tt\bold{50.2{cm}^{2}}$

So , Area of Circle is 50.2cm²...