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問題一覧
1
Area of Square
= s² where s is the length of each side
2
Area of Triangle
1/2 bh
3
Area of Rectangle
length x width
4
Area of Parallelogram
bh
5
Area of a Trapezoid
1/2 (A + B) x H
6
Perimeter of a Square
4s (ADD ALL THE SIDES)
7
Perimeter of Triangle
A + B + C
8
Perimeter of Rectangle
(2L) + (2W)
9
Perimeter of Parallelogram
2a + 2b
10
Perimeter of a Trapezoid
a + b + c + d
11
Volume of Cube
s³ (s)(s)(s)
12
Volume of a Right Circular Cone
1/3 πr²h
13
Volume of a Right Circular Cylinder
V = πr²h
14
Volume of an Irregular prism
V = bh
15
Volume of a Sphere
V = 4/3 πr³
16
Surface Area of a Cube
6s²
17
Surface Area of a Right Circular Cylinder
2πrh
18
Circumference of a Circle
2πr
19
Area of a Circle
πr²
20
Surface Area of a Sphere
4πr²
21
Acute Angle
BELOW / LESS THAN 90°
22
Right Angle
EQUAL TO 90°
23
Obtuse Angle
Larger than 90° but less than 180°
24
Complementary Angles
a + b = 90°
25
Supplementary Angles
a + b = 180°
26
Formula for Arithmetic Sequence
An = A1 + (n - 1)d
27
Sum of a finite arithmetic series
Sn = n/2 (a1 + an)
28
Formula for Geometric sequence
An = ar^n-1
29
Sum of a finite geometric series
Sn = A1 (1-r^n) / 1 - r
30
Sum of an infinite geometric series
Sn = A1 / 1 - r
31
Distance Formula
√(x2 - x1)² + (y2 - y1)²
32
Midpoint Formula
x = x1 + x2 all over 2 y = y1 + y2 all over 2
33
Equation of a circle
(x - h)² + (y - k)² = r²
34
The point slope form
y - y1 = m (x - x1)
35
Slope-intercept form
y = mx + b
36
Slope of a line
m = y2 - y1 all over x2 - x1
37
Quadratic Formula
x = -b ± √ b² - 4ac ALL OVER 2a
38
Mean
Average
39
Median
middle value in a series arranged from lowest to highest
40
Mode
The most common value in a series
41
What is the formula of PERMUTATION? (Repetition is ALLOWED)
- Order matters - If repetition is ALLOWED, we use the formula: P = n^r *where n = number of options r = number of positions
42
What is the formula of PERMUTATION (Repetition is NOT ALLOWED)
the number of all permutations of n things, taken at a time, is given by: P = n! / (n - r)!
43
What is the formula for CIRCULAR PERMUTATION
(n - r)!
44
What is the formula for COMBINATION
C (n, r) = n! / r! (n - r)! ORDER IS NOT IMPORTANT
45
Divisibility Rule of 2
If the number is even. (0, 2, 4, 6, 8)
46
Divisibility rule of 3
If the SUM of the digits is divisible by 3
47
Divisibility rule of 4
If it is even and the last two digits is divisible by 4
48
Divisibility rule of 5
If the last digit is either 5 or 0
49
Divisibility rule of 6
If it is even and divisible by 3
50
Divisibility rule of 8
If it is EVEN and the last 3 digits is divisible by 8
51
Divisibility rule of 9
If the sum of all its digits is divisible by 9
52
Converting Degrees to Radians
x° x π/180 NASA TAAS YUNG PI NASA BABA YUNG 180
53
Converting Radians to Degrees
x x 180/π NASA TAAS YUNG 180 NASA BABA YUNG π Tip: If no degree symbol (x°) is given, the problem is in radians.
54
Area of Rhombus
D1 x D2 OVER 2 D1xD2/2