6 point radar chart

Bonjour ! (1st time poster here)

Does anybody know of a good template I could use in order to create radar/spider web chart. Like this : http://www.visifire.com/silverlight_radar_polar_charts_gallery.php

 

 

I found this template https://community.articulate.com/discussions/articulate-storyline/radar-chart-graph

 

But when I try to adapt it, I struggle with the triangles (see attachment)

 

Any help is appreciated

 

 

 

 

 

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