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SAT Reference Sheet
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Geometry (Given on Test)
Circle
$$ A = \pi r^2 $$ $$ C = 2\pi r $$
Triangle
$$ A = \frac{1}{2}bh $$
Pythagorean
$$ a^2 + b^2 = c^2 $$
Volume (Cyl/Prism)
$$ V = \pi r^2 h $$ $$ V=lwh $$
Algebra (Memorize)
Slope
$$ m = \frac{y_2 - y_1}{x_2 - x_1} $$
Intercept
$$ y = mx + b $$
Quadratic
$$ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} $$
Circle Eq
$$ (x-h)^2 + (y-k)^2 = r^2 $$