I started by proving (to my own satisfaction) the 9 points on a circle with cascading links to other proofs required.
Major topics are listed on this page separately. The List of All Math Topics is a simple list of all titles.
I am currently (Feb 2020) converting this site from previous versions
Over the years, in fact 50+ years, I have been interested in maths. I studied A-Level Pure and A-level Applied Maths as two subjects in the mid sixties and then Physics degree in the late sixties.
However once free of the terrors of exams I began to appreciate and enjoy maths, be it always at a basic level and I have no pretence of having a real mathematical gift.
I tend to forget the insights and knowledge I gain once I move on so I thought I would document them, mainly for my own use, but who knows somebody may also find them interesting.
As primarily a note book for my maths this site has evolved over the years with different web tools and styles. I have not spent time in making it consistent as this tends to take more time than actually doing the maths. Some pages are just PDF versions of hand written notes (using Notability app) which enables my thinking to develop without having to be for ever correcting the syntax. Occasionally you may be surprised by better crafted pages using Latex.