I know with related rate problems the formula you use depends on the problem, but are there some common forumals you need to know?
i.e the are of a cirlce is pi r^2
Thanks.
Pythagoras' theorem
area of a triangle, there are several formulas for this, know them all
volume of a cuboid, sphere and cone
surface area of a cuboid, sphere and cone
sine rule
cosine rule
circumference of a circle
area of a sector
be familiar with the concepts of similar triangles, and the different kinds of angles there are
those are the more common ones