# Math II Final Exam Review – Flashcards

## Unlock all answers in this set

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Probability formula
Event outcomes/total possible outcomes
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Odds formula
Event occurs/event does not occur
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P(A and B)
P(A) • P(B)
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P(A or B)
P(A) + P(B) - P(A and B)
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Permutations
Without replacement and order matters
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Combinations
Without replacement and order does not matter
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Permutation formula
nPr= n!/(n-r)!
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Combination formula
nCr= n!/r!(n-r)!
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Factorial
Ex. 5! 5•4•3•2•1
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Reflection across x axis
(x,y) (x,-y)
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Reflection across y axis
(x,y) (-x,-y)
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Reflection across y=x
(x,y) (y,x)
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Reflection across y=-x
(x,y) (-y,-x)
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Rotation 90 counterclockwise or 270 clockwise
(x,y) (-y,x)
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Rotation 180
(x,y) (-x,-y)
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Rotation 270 counterclockwise or 90 clockwise
(x,y) (y, -x)
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Ways to prove similar triangles
AA, SSS, SAS
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Ways to prove congruent triangles
SSS, SAS, ASA, AAS
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Scalene
No congruent sides
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Isosceles
At least 2 congruent sides
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Equilateral
3 congruent sides
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Equilangular
3 congruent angles
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Rotational symmetry
A rotation which the figure is its own image
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Rotational symmetry formula
360°/# of sides
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Multiplying polynomials
Use either distribution, foil, or box method
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Ax^2+Bx+C=0 *set to equal 0 before trying to solve*
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Factoring formula
ab+ac=a(b+c) *look for GCF first*
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Factoring 3 terms
Find two numbers that multiply to give you a•c but add to give you the b value
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Difference of squares formula
(a^2-b^2)=(a-b)(a+b)
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Square roots
Isolate the variable and take the square root of each side
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b^2-4ac>0
Two real roots
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b^2-4ac=0
One real root
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b^2-4ac<0
Zero real roots
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+a parabola
Parabola will have a minimum and open up
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-a parabola
Parabola will have a maximum and open down
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Angle of elevation
From horizontal line of sight-up
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Angle of depression
From horizontal line of sight-down
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Area of oblique triangle formula