Important Note: Many of these geometrical formulas are actually printed in
the SAT exam instructions. So if you draw a blank, scan the instructions for the
formula you need.
We can use these formulas to solve the following questions.1 Jennifer wants to build a fence (God knows why people are always
building fences in questions like these) to enclose a circle with an
area of 144 × π. How much fencing will she need? (Draw a picture. It
usually helps.) Amount of fence = circumference Circumference = 2
× π × r