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ShapesEdit
CirclesEdit
π
or
where r = radius, d = diameter, and π = \pi (3.14..).
SquaresEdit
Where is the length of a side, and is the diagonal.
RhombusEdit
_{}_{}
Where d are the diagonals of the rhombus.
RectanglesEdit
Where is the length of a side, and is the width of a side.
TrianglesEdit
Note* All angles of a triangle always add to 180, meaning solving for an angle can be done by: where ,, and are angles of the triangle.
Trigonometric RatiosEdit
°
°
°
Area / OtherEdit
Where is the base, and is the height of the triangle.
The following formulas are only true for right angle triangles:
Where each letter indicates a different side length
The following formula is only true for a equilateral triangle:
Sin LawEdit
For any you may use sin law, or cos law.
or
Cos LawEdit
or
OtherEdit
Quadratic FormulaEdit
If this is not true, you may follow the formula:±
CombinationsEdit
a Combination is used when the 'order' of a
Combinations are defined by nCr
PermutationsEdit
A Permutation is an arrangement of a set. Used when the order of the set matters.
Permutations are defined by nPr.
Formula: