This article or section is incomplete and requires further information.
You can edit this page to improve it.



 Area = \pi r^2

 Circumference = 2πr

 r = 2/d or  d = 2r
where r = radius, d = diameter, and π = \pi (3.14..).


 Area = l^2

 Area = \frac{d^2}{2}

Where l is the length of a side, and d is the diagonal.


 Area = \frac{1}{2} \cdot d1d2

Where d are the diagonals of the rhombus.


 Area = lw

 Perimeter = 2(l + w)

Where l is the length of a side, and w is the width of a side.


Note* All angles of a triangle always add to 180, meaning solving for an angle can be done by:  a + b + c - 180 where a,b, and c are angles of the triangle.

Trigonometric RatiosEdit

 sin(°) = \frac{opp}{hyp}

 cos(°) = \frac{adj}{hyp}

 tan(°) = \frac{opp}{adj}

Area / OtherEdit

 Area = \frac{1}{2}bh Where b is the base, and h is the height of the triangle.

The following formulas are only true for right angle triangles:

 A^2 + B^2 = C^2 Where each letter indicates a different side length

The following formula is only true for a equilateral triangle:

 Area = \frac{s^2}{\sqrt 3\cdot4}

 a + b < c

Sin LawEdit

For any you may use sin law, or cos law.

 \frac{a}{sin(A)} = \frac{b}{sin(B)} = \frac{c}{sin(C)}


 \frac{sin(A)}{a} = \frac{sin(B)}{b} = \frac{sin(C)}{c}

Cos LawEdit

 a^2 = b^2 + c^2 - 2bccost(A)


 cos(A) = \frac{b^2 + c^2 - a^2}{2bc}


Quadratic FormulaEdit

 ax^2 + bx + c = 0

If this is not true, you may follow the formula: x = -b ±\sqrt \frac{b^2 - 4ac}{2a}


a Combination is used when the 'order' of a

Combinations are defined by nCr
 nCr = \frac{n!}{r!(n-r)!}


A Permutation is an arrangement of a set. Used when the order of the set matters.

Permutations are defined by nPr.

Formula:  nPr = \frac{n!}{(n-r)!}

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.