Here is the Master List of Legal Reasons

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Algebra and General Math Whole Numbers, Integers, Rationals, Irrationals, Reals, Operations on the Set of Reals, Properties of Equality, Slope, Pythagorean Theorem, Quadratic Formula, Odds, Evens, Primes, Diameters, and more
Level 1 Lines, Segments, Rays, and Distance
Level 2 Convex Sets, Counterexample, Midpoint, Circles, Intersection, Union, Polygons, Triangles
Level 3 Angles, Arcs, Equality Postulates, Slope, Parallel Lines, Perpendicular Lines
Level 4 Reflections, Translations, Rotations, Vectors, Isometries, Congruent Figures
Level 5 Corresponding Parts of Congruent Figures, Reflexive, Symmetric, Transitive Properties of Congruence, Alternate Interior & Exterior Angles Theorems, Perpendicular Bisector Theorem, Uniqueness of Parallel's Theorem, Triangle, Quadrilateral, and Polygon Sum Theorems
Level 6 Under Development
Level 7 Triangle Congruence Theorems, Properties of Parallelograms
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