File:P cartesian graph.svgDescriptionP cartesian graph.svg English: Wikimedia portal icon: Mathematics Date 11 August 2006 Source Own work based on: Nuvola apps kmplot.svg Author Chris-martin
File:Cartesian coordinates 2D.svgConvert to SVG $ skconvert Cartesian_coordinates_2D.sk Cartesian_coordinates_2D.svg Fix Cartesian_coordinates_2D.svg with Inkscape latex Cartesian_coordinates_2D
File:Clitheroe Intermediate.pdfsvg|Gnomonic triangle
File:Bettini(1660)-(2).svg|Circle marked each 30°
File:Bettini(1660)-(3).svg|Construction Lines
File:Bettini(1660)-(4).svg|Hour