sat math formulas (copy)

area of circle

area of circle

πr²

circumference of a circle

2πr

volume of cylinder

πr²h

volume of sphere

4/3 πr³

volume of cone

1/3 πr²h

volume of pyramid

1/3lwh

special right triangles

compounded interest

P(1+ r/n)^nt

rate =?

distance/time

adding concentrations

(concentration of A × Volume of A) + (Concentration of B × volume of B) = final concentration (volume of A + volume of B)

standard form of line

Ax+By=C

standard form of quadratic

ax²+bx+c

vertex

x= -b/2a

point slope form

(y-y₁)=m(x-x₁)

slope intercept form

y=mx+b

sum of solutions of quadratic

-b/a

completing the square

x²+bx+(b/2)²=c+(b/2)²

distance formula

√(x₂-x₁)²+(y₂-y₁)²

range

maximum-minimum

formula for circle

(x-h)²+(y-k)²=r²

central angle and inscribed angle

central angle = 2(inscribed angle)

circle radius and tangent

radius and tangent line are perpendicular

arc, circumference and central angle

x/360 = arc/circumference

central angle, sector, and area of circle

x/360 = sector/area of circle

sum of interior angles of polygon

180(n-2)

density

mass/volume

mode

the value that appears most often

standard deviation

measure of how far the values deviate from the mean

inequality theorem

the length of one side of triangle is less than the sum of other two sides and more than the difference of the other two sides

length of arc

(central angle/360)×2πr

area of sector

(central angle/360)×πr²

i²

-1

i³

-i

i⁴

1

Product of solutions

C/a

Area of equalateral triangle

√3/4 a²