Formulas Flashcards
(47 cards)
1
Q
Area of a circle
A
pir^2
2
Q
Circumference
A
2pir or pid
3
Q
Area and Volume of Rec
A
lw and lwh
4
Q
Area Triangle
A
1/2 bh
5
Q
Volume cylinder/what is cylinder
A
two circles connected and pir^2h
6
Q
Volume Sphere/ sphere?
A
4/3pir^3/ 3d circle
7
Q
Volume cone
A
1/3pir^2h
8
Q
Volume pyramid
A
1/3lwh
9
Q
Midpoint between 2 points
A
(x1+x2)/2, y1+y2/2
10
Q
Distance
A
sqrt(x2-x1)^2+(y2-y1)^2
11
Q
4590 triangle
A
s,s, hypotenuse s sqrt2
12
Q
603090 triangle
A
base sqrt3 *x, height x, hypotenuse 2x
13
Q
Length of an Arc
A
2pir(angle/360)
14
Q
Area of an arc
A
pir^2(angle/360)
15
Q
quadratic formula
A
b+-sqrt(b^2-4ac)/2a
16
Q
slope
A
(y2-y1)/(x2-x1)
17
Q
mean
A
sum of terms/number of terms
18
Q
speed
A
distance/time
19
Q
probability
A
number of x/total number of possibilities
20
Q
x percent of n
A
n(x/100)
21
Q
what percent is n of m
A
n100/m
22
Q
what is n x percent of
A
n100/x
23
Q
sine
A
opposite/hypotenuse
24
Q
cos
A
adjecent/hypotenuse
25
tan
sin/cos or opposite/adjecent
26
how to find angle given 2 sides
do the ^-1 of which ever two sides makes up sin cos or tan
27
how to find side given angle and one side
pick sin cos or tan (depending on which side you have) and solve for x
28
i=
sqrt-1
29
i^2
-1
30
i^3
-i
31
i^4
1
32
median
middle value of sorted terms. if stuck with 2 middle numbers, (x1+x2)/2
33
mode
value that appears most
34
range
last-first
35
sum
mean* number of terms
36
x^a *x^b
x^a+b
37
x^a/x^b
x^a-b
38
(x^a)^b
x^a*b
39
x^0
1
40
(xy)^a
x^a*y^a
41
1/x^b
x^-b
42
sqrtxy
sqrt x*sqrty
43
a^2+2ab+b^2
(a+b)(a-b)
44
a^2-2ab+b^2
(a-b)(a-b)
45
y=|x|
y= +x (x>=0) and -x(x<0)
46
Area of a circular triangle:
1/2angler^2
47
length of arc
rangle
