15 Dec nonagon
[vc_row content_placement="middle"][vc_column width="2/3"][vc_row_inner][vc_column_inner width="1/4"][vc_column_text][/vc_column_text][/vc_column_inner][vc_column_inner width="3/4"][vc_column_text css=".vc_custom_1539342518420{padding-top: 60px !important;}"] nonagon or enneagon, is a nine-sided polygon or 9-gon. A regular nonagon has internal angles of 140°...