GRE formula

Question 1

Area of a square

Answer 1

A=2S

Question 2

Perimeter of a Square

Answer 2

P = 4S

Question 3

Area of a Rectangle

Answer 3

A = LW

Question 4

Perimeter of a Rectangle

Answer 4

P= 2L+2W

Question 5

Area of a circle

Answer 5

A=“r^2

Question 6

Circumference of a circle

Answer 6

C= 2”R^2

Question 7

Area of a Triangle

Answer 7

A =1/2 BH

Question 8

Degrees of a triangle

Answer 8

Triangles have to have 180*

Question 9

Sides of right triangles

Answer 9

A^2+b^2=C^2

Or A^2=c^2/B^2

Question 10

Two special triangles

Answer 10

3^2 +4^2=5^2
And
5^2+12^2 =13^2

Question 11

Sides of the 30-60-90 triangle

Answer 11

A +2A + A(sqroot)3

Question 12

Sides of the 45-45-90 triangle

Answer 12

A+A+(sqroot)2

Question 13

Equilateral Triangle

Answer 13

All sides equal
Each angle is 60*
Are made up of 2 equal triangles of 30-60-90* angles

Question 14

Area of equilateral Triangle

Answer 14

A=(sqroot)3/2 xS^2

Question 15

Perimeter of equilateral triangle

Answer 15

P=3A

Question 16

Height of a equilateral triangle

Answer 16

H=(sqroot)3/2 xS

Question 17

6 laws of even and odd

Answer 17

Even + even = even
Odd + Odd = even
Even + Odd = Odd
Even x even =even
Odd xOdd = odd
Even x odd = even

Question 18

Distance formula

Answer 18

D=RT
R=D/T
T=D/R

Question 19

Slope

Answer 19

M=slope X = x point B= y point

Y=MX+B

Question 20

To find slope from points

Answer 20

S= Y2-Y1/ X2-X1

Question 21

Mean, Mode, Range and Median

Answer 21

Mead= the average
Median= the middle
Mode = the number that is repeated the most
Range = the difference between the highest and lowest number

Question 22

4 shifts of graph y=f(x)

Answer 22

Y=f(x)+ C …Shifts graph up.
Y=f(x)-C…… Shifts graph down.
Y=f(x+c).. .. Shifts graph to the LEFT
Y= F (x-c)…. Shifts graph to the RIGHT

Question 23

Volume of a cube

Answer 23

V= S ^3 (S=sides)

Question 24

Regular Prism Volume

Sides are ABC

Answer 24

V= AxBxC

Question 25

Volume of irregular Prism

Answer 25

V= BH. B=base H=height

Question 26

Volume of a cylinder

Answer 26

V= “r^2xH

Question 27

Volume of a Pyramid

Answer 27

V= 1/3BH

Question 28

Volume of a cone

Answer 28

V= 1/3 “ r^2 H

Question 29

Volume of a Sphere

Answer 29

V= 4/3 “ r^3