0
Q
area of a circle
A
πr²
1
Q
area of square
A
b • h
2
Q
area of trapezoid
A
½ h(a₁+b₂)
3
Q
surface area of a cube
A
6a²
4
Q
volume of a prism
A
l • w • h
5
Q
volume of a cone
A
⅓ b • h
6
Q
slope
A
(y₂ - y₁) / (x₂ - x₁)
7
Q
area of a rectangle
A
b • h
8
Q
pythagorean theorem
A
a² + b² = c²
9
Q
circumference of a circle
A
2πr
10
Q
area of a triangle
A
b • h / 2
or
½ b • h
11
Q
midpoint formula
A
(x₁+x₂)/2 , (y₁+y₂)/2
12
Q
area of a sector of a circle
A
n/360 • πr²
13
Q
distance
A
Rate • Time
14
Q
interest on money formula
A
I = P•R•T Interest = (principle•rate•time)
15
Q
Sine ratio
A
Opposite / Hypotenuse
16
Q
Cosine ratio
A
Adjacent / Hypotenuse
17
Q
Tangent ratio
A
Opposite / Adjacent
18
Q
Isosceles
A
2 equal sides, 2 equal angles
ACT Math
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