July 19, 2015
Circles are another favorite of the GMAT test writers. You might think that this should be a no brainer topic as there are only two formulas and a couple of terms that most of us learned about circles, but the integration of other geometry concepts is what makes gmat circle problems tough - and the few things you might not remember from high school.
A term that you absolutely must know is π . The approximate value of π is 3.14. This may come into play in some calculations in DS problems, but...