Equations To Remember Flashcards
What is the equation for the sum of the interior angles of a polygon?
180(n – 2)
where n is the number of sides of the polygon
What is the basic combination formula?
nCk = n!/(n-k)!k!
Where n is the number of objects in the set and k is the number of objects selected.
What is the basic permutation formula?
nPk = n!/(n-k)!
How are distance, rate and time related?
Distance = rate*time
Permutation formula for indistinguishable items
What is the equation for the number of ways you can arrange a set of items in a circle?
(K-1)!
Converging/Diverging Rate Formula
What is the quick to use equation that relates the square’s diagonal to its side?
d = s√2
What is the equation for the interior angle of a regular polygon which has all interior angles of equa measure?
180(n-2)/n
What are the equations for calculating the area of a regular hexagon?
(3√3)*s2 / 2
This can be approximated to: 2.6s2
If you know the distance between any two parallel sides you can also calculate the area with: 1.5d*s
Where d is the distance between the parallel sides and s is the length of one of the sides.
What is the three-part circle ratio?
What is the equation for the diagonal of a rectangular box?
What is the equation for the diagonal of a rectangular box?
d2 = l2 + w2 + h2
Arithmetic and Geometric Sequence Formulas
an = a1 + (n-1)d
an = a1* rn-1
Sum of terms of an arithmetic sequence equation
Sn = n/2 * (a1 + an)
