Question

what is the area of a circle with the diameter 4cm ?

Answer 1

Answer:

Area =πr^2

=3.14*2*2

=12.566

Answer 2

Given:

Diameter=4cm

To find:

The area of the circle

Solution:

The required area is 12.57 $cm^{2}$.

We can obtain the area required by obtaining the circle's radius.

The circle's radius, r=Diameter/2=4/2=2 cm

Now, the circle's area=π×$r^{2}$

We will use the given values and obtain the area.

Using the values,

Required area=22/7×2×2

=88/7

=12.57 $cm^{2}$

Therefore, the required area is 12.57 $cm^{2}$.