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TMSCA Formulas
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Algebra
Linear Algebra
TMSCA
8th
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54 Terms
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1
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Circumference of a Circle
π\*d (d=diameter)
2
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Area of a Circle
πr² (r=radius)
3
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Area of a Square w/ Diagonal
d²/2 (d=diagonal)
4
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Area of a Parallelogram
b\*h (b=base & h=height)
5
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Area of a Trapezoid
1/2h(b₁+b₂) (b₁ is the bottom edge and b₂ is the top edge)
6
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Area of a Triangle
bh/2
7
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Area of a Rhombus
d₁\*d₂/2 (d₁=up and down diagonal) (d₂=left and right diagonal)
8
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Area of Scalene Triangle (Heron's Formula)
√s(s - a)(s - b)(s - c) (abc - sides of triangle, s- semiperimeter)
9
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Semipermeter
a+b+c/2
10
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Area of an Equilateral Triangle (w/ Side)
(s²\*√3)/4
11
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Area of an Equilateral Triangle (w/ Height)
(h²√3)/3
12
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Height of an Equilateral Triangle (given side)
(s√3)/2
13
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Diagonal of a Square
side√2
14
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Area of Any Regular Polygon (w/number and length of sides)
ns²/4 tan(180/n) (n=number of sides and s= length of sides)
15
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Area of Any Regular Polygon (w/perimeter and apothem)
pa/2 (p=perimeter and a= apothem)
16
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Inner Diagonal of cube
side√3
17
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Surface Area of a Cube (w/ edge)
6e² (e=edge)
18
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Surface Area of a Cube (w/ inner diagonal)
d²\*2 (d=inner diagonal)
19
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Surface Area of a Cube (w/ volume)
6v²/3 (volume)
20
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Surface Area of Rectangular Prism
2(lw+lh+wh)
21
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Inner Diagonal of a Rectangular Solid
√L²+w²+h²
22
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Lateral Surface Area of a Cylinder
2πrh (r\=radius and h\=height)
23
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Lateral Surface Area of a Cone
√r²+h²
24
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Total Surface Area of a Cylinder
2πr(r+h)
25
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Total Surface Area of a Cone (given slant height
πr(r+s) (s\=slant height)
26
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Surface Area of a Sphere
4πr²
27
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Surface Area of a Hemisphere
3πr²
28
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Volume of a Cube (given edge)
e³ (e\=edge)
29
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Volume of a Rectangular Prism
l*w*h
30
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Volume of a Cylinder
πr²h
31
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Volume of a Cone (given radius & height)
πr²h/3 (h\= height, r\=radius)
32
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Volume of a Cone (given diameter & height)
1/12*πd²h (h\=height, d\=diameter)
33
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Volume of a Sphere
4πr^3/3
34
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Volume of a Hemisphere
(2/3)πr^3
35
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Volume of a Pyramid
bh/3 (b\=area of base and h\=height)
36
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Total Number of Subsets or Power Set
2^n (number of elements)
37
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Number of Proper Subsets
2^n-1 (number of elements)
38
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Permutations (Ways something can be arranged in an order)
n! ÷ (n-r)! (n\=total number of objects and r\=number of objects selected)
39
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Total of Sequences
n(n+2)/4 (n=last number)
40
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Combinations (Ways something can be arranged w/o order in mind)
n!/r!(n-r)! (n\=total number of objects and r\=number of objects selected)
41
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Work of Two People Combined
n*n/n+n
42
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Sum of roots in Quadratic
-b/a
43
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Product of Roots in Quadratics
c/a
44
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Axis of Symmetry
-b/2a
45
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Volume of a cube (given Inner diagonal)
(3√d)*3 (d\=inner diagonal)
46
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Midpoint of two points
(x1 + x2)/2, (y1 + y2)/2
47
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Midrange
Highest number+Lowest number/2
48
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Interior Angle of a Regular Polygon
(n-2)180 (number of sides)
49
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Number of Diagonals in a Polygon
((n-3)n)/2 (n=number of vertices or sides)
50
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Geometric Mean
√ab (a=one number, b=second number)
51
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Exterior angle of a regular polygon
360/number of sides
52
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Number of diagonals from one vertex
n-3 (n=number of sides or vertices)
53
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Simple Interest
prt
54
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Triangular Number
n(n+1)/2
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