a few random comments:
* the "intersecting chords" and "intersecting tangents/secants" formulas are outside the scope of the gmat.
* you also won't have to know how to calculate the lateral area of a cone.
* i'm not sure whether you have to know the sphere formulas, but i don't think you do (does anyone know about this for sure, either way?)
* some of these formulas are redundant enough to be a waste of your time and effort. for instance, if you know that the area of a circle is pi(r^2), then there is very little point in ALSO memorizing that it is pi(d^2/4), since it's so easy to calculate the radius if you have the diameter.
* on the other hand, some of the formulas are TREMENDOUS shortcuts, especially
- diagonal of a rectangular solid
- diagonal of a cube
- area of an equilateral triangle
Ron has been teaching various standardized tests for 20 years.
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Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.
Yves Saint-Laurent
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