2. Algebra 
 4.1. Solid Geometry 
 4.2. Coordinate Geometry 
 4.2.1. Points 
 4.2.2. Distance between Two Points 
 4.2.4. Slope 
 4.2.5. Equation of a Line 
 4.2.6. Circles and Parabolas 
 4.2.7. Area of Triangle 
 4.2.8. Area of Parallelogram 
 4.2.9. Centroid of a Triangle 
 5. Trigonometry 
 6. Functions 
 Global
 Global