Hey all,
The selective exam is next week! During this tense but exciting time until the exam, I thought it would be a good idea to have a discussion were we can post formulas from all areas of maths that relate to topics in the sehs exam.I want this to kinda be like the count to 20 mod posts,so we always have different formulas.Would really appreciate this and to start of the discussion here is my formula:
Area of circumference=2πr
