ACT formulas needed
ACT Practice
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35 Terms
Area of Triangle
½bh
Parallelogram Area
b*h
Circle Area
πr²
Circle Circumference
2πr
Trapezoid Area
½ (b1 + b2)h
Kite Area
½lw
Rectangular Prism Volume
lwh
Cube Volume
s3
Right Cylinder Volume
πr2h
Volumes of most 3 dimensional solids
V = Base * Height
Pythagorean Theory
a2 + b2 = c2
Area of Equilateral Triangle
(s2√3)/4
What is missing?
x√2
What is the side?
x√3
What is the hypotenuse?
2x
Sides of a triangle rule
a + b > c
Slope
y1 - y2/x1 - x2
Point slope formula
y - y1 = m(x - x1)
Midpoint
[(x1 + x2)/2, (y1 + y2)/2]
Distance
√(x1 - x2)2 + (y1 - y2)2
Percent change
final value - initial value/initial value * 100
Direct Proportion
y = kx
Indirect proportion
y = k/x
ax * ay
axy
a0
1
a-x
1/ax
vertex form
y = a(x - h)2 +k
ax/ay
ax-y
probability
desired outcomes/all possible outcomes
ax/y
y√ax
n√xy
n√x * n√y
logab = c
ac = b
loga(xy)
logax + logay
loga 1
0
logb(x/y)
logax - logay
