formulaas for dshape

circle circumference

circle circumference

2(pi)r

circle area

(pi)r²

ohms law

v/ir

v=ir

v/i=r

v/r=i

commutative property

a + b = b + a

identity property

a + 0 = a

associative property

(a + b) + c = (c + b) + a

permutation

n!/(n-r)!

combination

n!/(n-r)!r!

combined gas law

p1v1/t1 = p2v2/t2

protons

atomic number

neutrons

atomic mass - atomic number

square area

s²

square perimeter

4s

rectangle area

lw

rectangle perimeter

2l + 2w

rhombus area

½d1d2

kite area

½d1d2

trapezoid area

½(b1+b2)h