Which is approximately equal to the area of the circle? Use 3.14 for Pi

Question

anonymous · Answer

$$\pi r^2$$

parthkohli · Answer

Area is pi * r*r

$\Large \color{Black}{\Rightarrow 3.14r^2 }$

shubhamsrg · Answer

none..area = pi (r^2)
when r=1,,then the above ques comes into play
for approximation,,3.14 is used..
but if you want to be more and more precise..use (pi) ..the more digits you use of pi,,the more exact result you get..<--but last step is useless!!

anonymous · Answer

|dw:1338296266276:dw|

parthkohli · Answer

Then that'd be:

$\Large \color{Black}{\Rightarrow 3.14 \times 4 \times 4 }$

anonymous · Answer

thats ur radius

anonymous · Answer

Parth are u sure that will give me my answer

anonymous · Answer

I vouch for @ParthKohli

parthkohli · Answer

It is $\approx$ 48.42

parthkohli · Answer

Thank you @Kiki547 :) you're now a good lad on OpenStudy :D

anonymous · Answer

i am a girl u know right don't u mean lassie lol

lgbasallote · Answer

he's sexist...he calls everyone a guy

parthkohli · Answer

lol i'm a bad boy xD

unklerhaukus · Answer

$$\pi\approx3.14,\qquad\qquad r=4$$$$A_{circle}=\pi r^2\approx3.14\times4^2=3.14\times16=48+1.6+0.64=50.24$$

parthkohli · Answer

Where did that 1.6 come from?

unklerhaukus · Answer

$$0.1\times16=1.6$$

unklerhaukus · Answer

$$3.14\times16=3\times16+0.1\times16+0.04\times16$$