find the circumference of a circle with a radius of 4cm use 3.14 for pi

Question

saifoo.khan · Answer

Do u know the formula?

saifoo.khan · Answer

Please Try first.

anonymous · Answer

8x3.14=25.12

anonymous · Answer

ummm pi r 2???

saifoo.khan · Answer

C = pi D.

D = diameter.

anonymous · Answer

circumference = 2*pi*r
                     = 2*3.14*4cm
                     = 8*3.14cm
                     = 25.12 cm
see here u just want to know the formula then after that it is much easier

anonymous · Answer

or pi r 2

saifoo.khan · Answer

Right, same thing.

anonymous · Answer

yeah okay so 3.14 
                     x  8

saifoo.khan · Answer

Correct.

saifoo.khan · Answer

Now i will give u a Good Answer when u will try yourself too! :)

anonymous · Answer

yay is that how its aligned though too?

saifoo.khan · Answer

C = 2 * pi * r
C = 3.142 * 8
C = 25.136cm.

anonymous · Answer

thanks :D

saifoo.khan · Answer

No Problem!

anonymous · Answer

Dude, I said the answer 10 hours ago.

anonymous · Answer

wait i got 25.12 saifoo.khan

saifoo.khan · Answer

That is same thing. Decimals dont matter much if the question doesn't says about worrying for decimals.

u are getting 2 in the end coz u took 3.14 for pi.
I took 3.142, where 3 decimal places are used as a standard.

anonymous · Answer

but it does matter in my math book

anonymous · Answer