First try. Look at that last Parallelogram score.
Your inaccuracy by category:
Parallelogram 11.4 3.6 0.0
Midpoint 2.2 2.2 1.0
Bisect angle 2.4 0.2 6.6
Triangle center 10.3 5.2 5.5
Circle center 11.2 9.1 5.4
Right angle 2.5 2.2 0.7
Convergence 7.3 7.1 2.2
Average error: 4.68 (lower is better)