Outline
Vector Methods
Vector methods, reflection, refraction (Snell's law), perspective, and other groundwork for representing 2D and 3D differential geometry and physics.
___
These are my self-study materials. Let me know how I can make them more useful to you.

Table of Contents
Algebra and Elementary Geometry
- Vector Decomposition
- Vector Methods: Point to line
- Tool: Altitude of a triangle
- Vectors: Angle Bisector
- Circle Through Three Points
- Vectors: Incircle
- Vector Algebra: Inequalities in the plane
- Convex Quadrilateral 1 (quiet)
- Convex Quadrilateral 2 (loud)
- Centroid of a triangle
- Centroid of a polygon
- Complex Algebra: Rotation
Intersection Machine
Collision
Orientation
From 100 Great Problems
Light
Conic Sections & More
The Tangent Circle Problem
Supplement: Zeros of trigonometric polynomials