please help I need to know how to do this in articulate or powerpoint.

One way to do this

Layer 0
Create the chart in powerpoint > insert > chart > pie/doughnut

If nothing else this will be your guide

Layer 1 shape layer A
Create shape (pie) adjust  to fit the segment in the chart.  You can also rotate the shapes if you want rather than trying to drag the shape to size. 

Layer 2

Duplicate the shapes from layer 1.  Copy, and recenter the shapes,  reduce pie wedge to fit for the section. 
repeate for each section.

Laeyr 3 as per layer 2

Be sure to open the layers so that that the top layers get opened last.  This approach uses layer stacking to mask the other sizes.

This should get you your shapes that you need with only a huge aggravation.  one thing that I can't stress enough is to make sure you have the alignment correct.  save often.  All layers must show.