deck_16931256 Flashcards
1
Q
Simple interest
A
prt
2
Q
Compound interest
A
P(1+r/n)ⁿᵗ
3
Q
Area of circle
A
πr^2
4
Q
Circumference
A
2πr
5
Q
Surface area of sphere
A
4πr²
6
Q
Volume of sphere
A
4/3πr³
7
Q
Perimeter of a triangle
A
a+b+c
8
Q
Volume of cylinder
A
πr²h
9
Q
Surface area of sphere
A
4πr²
10
Q
Surface area of cylinder
A
2πrh+2πr²
11
Q
Quadratic formula
A
(-b±√b²-4ac)/2a
12
Q
Area of triangle with sin
A
(1/2)bc*sinA
13
Q
Exterior angle of a shape
A
360°/n
14
Q
Interior angle of a shape
A
((n-2)180°)/n
15
Q
Sine rule
A
SinA/a = SinB/b = SinC/c
16
Q
Surface area of cuboid
A
2(lw+lh+wh)
17
Q
Volume of cuboid
A
lbh
18
Q
Law of cosine
A
c²=a²+b²−2ab cosC
19
Q
Speed
A
d/t
20
Q
arc length of sector
A
2πr(θ/360)
21
Q
arc length of a sector
A
(θ/360)2πr
22
Q
Pythagorean theorem
A
a^2+b^2=c^2
23
Q
+?
A
Top left: S
Top right : A
Bottom right: C
Bottom left: T
24
Q
θ? in ‘+’ A?
A
0
25
θ? in '+' S?
180-θ
26
θ? in '+' T?
180+θ
27
θ? in '+' C?
360-θ
28
length of a line
√((x2-x1)²+(y2-y1)²)
29
slope of a line
(y2-y1)/(x2-x1)
30
Finding upper bound with division
UB/LB
31
Finding upper bound with subtracion
UB-LB
32
Finding lower bound with division
LB/UB
33
Finding lower bound with subtraction
LB-UB
34
Area of sector
(θ/360)πr²
35
How many sides in a quadrilateral
4
36
How many sides in a pentagon
5
37
How many sides in a hexagon
6
38
How many sides in a heptagon
7
39
How many sides in a octagon
8
40
How many sides in a nonagon
9
41
How many sides in a decagon
10
42
Formula for arc length with degrees
(θ/360)2πr
43
Geometric sequence
a(r)ⁿ⁻¹
44
Arithmetic sequence
a+(n-1)d
45
Frequency density
frequency/class width
46
Formula for class width
Max value of class - min value of class
47
Midpoint of a line
{(x1+x2)/2}, {(y1+y2)/2}
48
Surface area of cone
πrl
49
Volume of cone
πr²h(1/3)
50
Volume of pyramid
(lwh)/3
51
When to use arithmetic formula?
Common difference (-3, -3, -3)
52
When to use geometric formula?
Common ratio (×2, ×2, ×2)
53
Find gradient of gradient
d²y/dx²
54
Finding nature of stationary points
d²y/dx²
55
Area of trapezium
(a+b/2)*h
