Formulas

Question 1

Area of a circle

Answer 1

pir^2

Question 2

Circumference

Answer 2

2pir or pid

Question 3

Area and Volume of Rec

Answer 3

lw and lwh

Question 4

Area Triangle

Answer 4

1/2 bh

Question 5

Volume cylinder/what is cylinder

Answer 5

two circles connected and pir^2h

Question 6

Volume Sphere/ sphere?

Answer 6

4/3pir^3/ 3d circle

Question 7

Volume cone

Answer 7

1/3pir^2h

Question 8

Volume pyramid

Answer 8

1/3lwh

Question 9

Midpoint between 2 points

Answer 9

(x1+x2)/2, y1+y2/2

Question 10

Distance

Answer 10

sqrt(x2-x1)^2+(y2-y1)^2

Question 11

4590 triangle

Answer 11

s,s, hypotenuse s sqrt2

Question 12

603090 triangle

Answer 12

base sqrt3 *x, height x, hypotenuse 2x

Question 13

Length of an Arc

Answer 13

2pir(angle/360)

Question 14

Area of an arc

Answer 14

pir^2(angle/360)

Question 15

quadratic formula

Answer 15

b+-sqrt(b^2-4ac)/2a

Question 16

slope

Answer 16

(y2-y1)/(x2-x1)

Question 17

mean

Answer 17

sum of terms/number of terms

Question 18

speed

Answer 18

distance/time

Question 19

probability

Answer 19

number of x/total number of possibilities

Question 20

x percent of n

Answer 20

n(x/100)

Question 21

what percent is n of m

Answer 21

n100/m

Question 22

what is n x percent of

Answer 22

n100/x

Question 23

sine

Answer 23

opposite/hypotenuse

Question 24

cos

Answer 24

adjecent/hypotenuse

Question 25

tan

Answer 25

sin/cos or opposite/adjecent

Question 26

how to find angle given 2 sides

Answer 26

do the ^-1 of which ever two sides makes up sin cos or tan

Question 27

how to find side given angle and one side

Answer 27

pick sin cos or tan (depending on which side you have) and solve for x

Question 28

i=

Answer 28

sqrt-1

Question 29

i^2

Answer 29

-1

Question 30

i^3

Answer 30

-i

Question 31

i^4

Answer 31

1

Question 32

median

Answer 32

middle value of sorted terms. if stuck with 2 middle numbers, (x1+x2)/2

Question 33

mode

Answer 33

value that appears most

Question 34

range

Answer 34

last-first

Question 35

sum

Answer 35

mean* number of terms

Question 36

x^a *x^b

Answer 36

x^a+b

Question 37

x^a/x^b

Answer 37

x^a-b

Question 38

(x^a)^b

Answer 38

x^a*b

Question 39

x^0

Answer 39

1

Question 40

(xy)^a

Answer 40

x^a*y^a

Question 41

1/x^b

Answer 41

x^-b

Question 42

sqrtxy

Answer 42

sqrt x*sqrty

Question 43

a^2+2ab+b^2

Answer 43

(a+b)(a-b)

Question 44

a^2-2ab+b^2

Answer 44

(a-b)(a-b)

Question 45

y=|x|

Answer 45

y= +x (x>=0) and -x(x<0)

Question 46

Area of a circular triangle:

Answer 46

1/2angler^2

Question 47

length of arc

Answer 47

rangle