anonymous 5 years ago i mean i really need help wid pi

1. anonymous

plzzzzzzzzzzzzzzzzz help meee

where is the problem?

$\pi\approx3.1415$

4. anonymous

well it is 42 as the circumference and u half to multiply it by a peice of pie and the find the radis

5. anonymous

this is so hard

Are you trying to solve for the radius of a circle when the circumference is given?

7. anonymous

no it is where u half to have the diameter and u half to multiply by a peice of pie= and so on

8. anonymous

$42\times3.14 i think$

Hi jade101 what is your age? I explain you as per that.

10. anonymous

i'm 12

11. anonymous

we started learning pi in 5th but i never get no help

The formula for circumference of a circle is $C=2\pi r=\pi D$ where C is circumference r is radius D is diameter. so give that circumference is 42. if you need diameter then you get $D=\frac{C}{\pi}=\frac{42}{\pi}=\frac{42}{3.1415}$