Just can't get that Triangle Center even close.
Your inaccuracy by category:
<TABLE id=scores cellSpacing=1 border=0><TBODY><TR><TD width=130><TD width=50><TD width=50><TD width=50><TR><TD>Parallelogram</TD><TD align=right>5.4</TD><TD align=right>----</TD><TD align=right>----</TD></TR><TR><TD>Midpoint</TD><TD align=right>5.8</TD><TD align=right>----</TD><TD align=right>----</TD></TR><TR><TD>Bisect angle</TD><TD align=right>2.3</TD><TD align=right>----</TD><TD align=right>----</TD></TR><TR><TD>Triangle center</TD><TD align=right>15.3</TD><TD align=right>----</TD><TD align=right>----</TD></TR><TR><TD>Circle center</TD><TD align=right>3.6</TD><TD align=right>----</TD><TD align=right>----</TD></TR><TR><TD>Right angle</TD><TD align=right>1.7</TD><TD align=right>----</TD><TD align=right>----</TD></TR><TR><TD>Convergence</TD><TD align=right>5.7</TD><TD align=right>----</TD><TD align=right>----</TD></TR></TBODY></TABLE>Average error: 5.69 (lower is better)