Digital SAT important math rules to know

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Last updated 3:28 PM on 2/5/24
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7 Terms

1
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Slope

(y2-y1)/(x2-x1)

2
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Vertex form of a Quadratic Function

f(x) = a(x – h)^2+ k

Vertex: x-intercept (h)

y-intercept (k)

3
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Circle theorem

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4
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Length of arc

S=rtheta

θ Is measured in radians in this equation

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A circle with center (h,k)

(x – h)2+ (y – k)2 = r2

6
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If a line is perpendicular to another linear line

The slope is the negtive reciprocal

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Quadratic formula

x = \frac{ -b \pm \sqrt{b^2 - 4ac}}{2a} when ax^2 + bx + c = 0