411 REFERENCE · Wikibooks
High School Mathematics Extensions/Supplementary
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
About supplementary chapters
All supplementary chapters contain materials that are part of the standard high school mathematics curriculum; therefore, the material is only provided for completeness and should mostly serve as revision.
For more detailed explanations consider checking other Wikibooks such as
Basic Algebra
Algebra
Geometry
High School Trigonometry