Year 9 Mathematics
- Author:
- Patrick Robertson

Table of Contents
Geometry
- Complementary Meaning?
- Supplementary Angles (Quick Exploration)
- Vertical Angles Exploration (1)
- Exploring Alternate Interior Angles (V2)
- Exploring Alternate Exterior Angles (V2)
- Exploring Corresponding Angles (V2)
- Same-Side-Interior Angles: Quick Investigation
- Same-Side-Exterior Angles: Quick Investigation
- Transversal Intersects Parallel Lines
- Polygon Angle Theorems: Triangle through Octagon
- Polygons: Exterior Angles - REVAMPED