5.59 ...not great but on one I got the circle dead center
Your inaccuracy by category:
Parallelogram 9.8 12.1 4.1
Midpoint 3.6 2.2 1.4
Bisect angle 5.0 8.0 5.0
Triangle center 5.0 5.2 4.0
Circle center 0.0 6.3 4.2
Right angle 2.6 10.7 14.7
Convergence 2.2 4.1 7.2
Average error: 5.59 (lower is better)
Got to play again...dang you avesher