Polygonal simple polygonal art simple PPT background picture

The first PPT background picture is made up of polylines and blue-white polygons, gradually clear from the center to both sides; the second PPT background picture is an abstract color design; the third PPT background picture is on the right side of the white curve below the elegant blue-green; The fourth PPT background image is interlaced transparent gradient colors;

Keywords: polyline, curve, polygon PPT background picture, concise background picture, artistic PPT background picture