itle="headbutt.twod.shapes.Circle">Circle</a></td><td><p>A circle has a centre and a radius</p></td></tr><tr class="class"><td style="width:200px;"><a href="../../../headbutt/twod/shapes/Line.html" title="headbutt.twod.shapes.Line">Line</a></td><td><p>Two points form a line in 2D</p></td></tr><tr class="class"><td style="width:200px;"><a href="../../../headbutt/twod/shapes/Polygon.html" title="headbutt.twod.shapes.Polygon">Polygon</a></td><td><p>A collection of points in 2D, which together define a <strong>