3. 2D Geometry
3.1
Lines
Universal Properties
Systems of Linear Equations
Matrix Notation
3.2
Triangles
Universal Properties
Types & Terminology
Intersections
Vivaldi's Theorem
Right Angle (Pythagorean) Theorem
Heron's Formula
Distance Formula
Right Angle Definitions
3.3
Matricies & Vectors
Matrix Definition & Notation
Identity Matrix
Matrix Arithmetic
Determinant
Matrix Solutions with Determinants (Cramer's Rule)
Inverse Matrix
Transpose Matrix
Vector Definition & Notation
Vector Magnitude & Unit Vector
Vector Arithmetic
Dot Product
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Orthogonal Projection
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3.4
Polygons
Universal Properties
Types
Regular Polygons
3.5
Conic Sections
Universal Properties
Circles
Ellipses
Parabolas
Hyperbolas
Rotations
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