It depends on exactly what it is that is being asked. So let's break it down and see what we can find out.
We know that a circle has a total central angle of 360 degrees or 2pi radians.
For simplicity, we will use degrees, so if we want to know the central angle of each slice then we will divide 360 by 6.
*Keep track of these angles as you will need them for the next step.
If you want to know the arc length of each slice then you will take the central angle of just one slice, then multiply it by the radius of the pie.
Do these same steps for the pie cut into 8 slices.
**note: if you need to convert degrees to radians it's: the radian angle multiplied by π/180. So if given in radians the formula will be (radian θ * π/180) * radius.
