<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20000303 Stylable//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="100%" height="100%">
<polygon points="180,100 250,310 370,250"
style="fill:#fffffff;
stroke:#000000;stroke-width:1"/>
</svg>

see this example here