A Polar Graph with 5 concentric circles showing radius and divided into sections of 10 degree (labeled) each , vintage line drawing or engraving illustration.
Round radar chart, Kiviat diagram or spider graph template isolated on white background. Method of comparing items on different characteristics. Vector graphic illustration
A Polar Graph with 5 concentric circles showing radius and divided into sections of 30 degree (not labeled) each , vintage line drawing or engraving illustration.