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A

A=1/2 bh

P=a+b+c it's summing up all three sides lengths

P=a+b+c it's summing up all three sides lengths

A&P of Square

A=s2 (s is the length of one side)

P=4s

A&P of Rectangle

A=2L+2W (length and width)

P=lw (lengthXwidth)

A&P Parallelogram

A=bh (baseXhight)

A&P of trapezoid

A=1/2h(b1 +b2) where b are the two parallel sides

P=a+b1+c+b2 (the sides)

A&P of Circle

A=pir2 r is radius

P (aka Circumfrence) C=2pir (r is radius)

Convert decimal to percent

(0.23)

Convert percent to decimal

(0.23)

Convert percent to decimal

Write a % as a fraction 15%

Convert a percent to a decimal

Decimal to percent

Percent to fraction (whole number)

Percent to fraction 65.3%

Fraction to percent 5/8 as percent

Decimal to fraction (0.75)

Divide fractions

a negative exponant tells you how many times to divide the number by^{-3}

reciprocal is simply 1/the number

so the reciprocal of 8 is

what's the reciprocal of a fraction?

with a negative exponent, take its reciprocal (which will always be positive) and then divide out

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