𝖠𝖢𝗧 𝗆𝖺𝘁𝗁 𝗺𝗎𝗌𝘁-𝗄𝗻𝗼𝗐𝗌 (𝖻𝖺𝘀𝗂𝗰)୨୧

✩= 𝖿𝗿𝗲𝗊𝘂𝖾𝗇𝘁𝗹𝗒 𝘂𝗌𝗲𝖽 𝖽𝘂𝗿𝗂𝗇𝗴 𝗉𝗋𝗮𝗰𝗍𝗶𝗰𝖾 𝗍𝖾𝘀𝗍𝗌

✩Slope-intercept

y=mx+b

✩✩slope formula

m=(y2-y1)/(x2-x1)

✩Pythagorean theorem

a²+b²=c²

Circle

(x-h)²+(y-k)²=r²

(h,k): center of circle

r: radius

Area of a circle

A= πr²

Circumference of a circle

C= 2πr

Distance

d=√(x2-x1)²-(y2-y1)²

✩Midpoint

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

(Think how to find an average.ᐟ)

✩Slope

Rise/ run

Area of a triangle

A= 0.5bh

Area of trapezoid

[(b1+b2)*h]/2

✩SOH CAH TOA

sine: opposite/ hypotenuse

cosine: adjacent/ hypotenuse

tangent: opposite/ adjacent

quadratic formula

(-b±√b²-4ac)/2a

Difference of squares

a²-b²= (a-b)(a+b)

Logarithms

logb (x)=y means bʸ= x

b= base

Diagonal of a square

(side)√2

How to remember: square is a 2D object, thus √2‎(ᐡ`ᐧ ﻌ ᐧ´ᐡ)

Diagonal of cube

(Side)‎√3

How to remember: cube is a 3D object, thus √3 Ｕ*`∀´*Ｕ

Area of rhombus

A= (p*q)/2

p and q= diagonals of rhombus

✩Percentage increase/ decrease formula

(difference/ original)*100

✩Compound interest formula

A=P(1+ʳ⁄ₙ)^nt

A=amount

P=original amount

r=interest rate

n=number of times interest is compounded per year

(n)t= time (usually years)

prime numbers

1 is NOT a prime number!!!!!

2 is the only even prime number, also the smallest prime number