SAT Math Formulas

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chuddy

Last updated 7:41 PM on 8/18/26
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17 Terms

1
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New value

Original(1± x / 100)

2
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Total

Part / Percent as decimal

3
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The Reversible Law

X% of Y is exactly the same as Y% of X

4
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Percentage Increase

(New - Old / Old) times 100

5
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Percentage Decrease

(Old - New / Old) times 100

6
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Sum of solutions

-b / a

7
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Product of solutions

c / a

8
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Vertex form

y = a(x-h)² + k

9
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Number of solutions

b² - 4ac

10
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Area of equilateral triangle

sqrt(3)/4 times a²

11
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Sector area

1/2(r²)(θ) ← radians

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Arc length

S = θr ← radians

13
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Midpoint

((x1+x2)2 , (y1+y2)2)

14
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X value of vertex

-b/2a

15
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Height of Equilateral triangle

knowt flashcard image
16
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Y coordinate of vertex

negative discriminant / 4a

17
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Volume of right square prism

A = a²h