WGU QL Formulas

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Author:
treborprime
ID:
26143
Filename:
WGU QL Formulas
Updated:
2010-07-09 12:09:56
Tags:
WGU QL math formulas
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Description:
Formulas review QL
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  1. Measure of angles for triangle and Polygons
    • Sum of the three angles for a triangle is <A + <B+ <C = 180
    • Polygons
    • Where n is the number of sides
    • (n-2)*180
  2. Perimeter
    • Polygon - add up the length of all sides
    • Rectangle = 2(L+W)
    • Square = P = 4*s
  3. Area review
    Squared units
    • rectangles
    • A=L*W
    • Squares
    • A=s2
    • Paraellogram
    • A=b*h
    • Triangles
    • A=1/2*b*h
    • Trapezoids
    • A=1/2*h*(a+b)
  4. Circles

  5. Volume and Surface area
  6. Factoring
  7. Quadratic equations

  8. Sequences
    • Arithmetic
    • Found by adding a common number to the first term and then to the second term etc. Find this common
    • term by subtracting a 2nd number from 1st etc. Be sure to spot the pattern.

    • To find the Nth term
    • – use a formula

    • Where
    • a1 = first term of sequence
    • an = the term you wish to find
    • d= common difference
    • n – place position of the
    • term IE Find term 20 – n = 20

    an= a1 + d(n-1)

    Geometric Sequences

    • Found by multiplying a common number from 1 term to the next. For example multiplying 3 by the first term and then multiplying 3 by the
    • first number etc. Find the common ratio by problem solving and spotting the pattern.

    Can do this by dividing the 2nd term by the first term – this is called the common ratio. Can use decimals or fractions.

    • To find the Nth term – use a formula
    • Use exponents ( r = common ratio)

    an = a1 x r n-1

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