Joann is mugging hard. trying to remember maths formulas.
Expansion and Factorisation.
(a + b)square = (a)square + 2(a)(b) + (b) square.
(a - b)square = a square - 2(a)(b) + (b) square.
(a + b)(a - b) = (a)square - (b)square.
Pythagoras' theorem,
(a)square + (b)square = (c)square.
Mensuration
Volume of pyramid = 1/3 x base area x height.
Volume of Cone = 1/3 pie x (r)square x height,
Curved surface area of cone = pie x r x slant height,
Total Surface area of cone = (pie x r x slant height)x (pie x (r)square)
Volume of Sphere = 4/3 pie (r)square
Surface area of Sphere = 4 pie (r)square.
Data Analysis
Mean (Average) = sum of values / number of values
Median = Middle value
Mode = Value with the highest frequency

ohmygod, I don't want to forget all these. please.
Jiayou, make me super. :>