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- Area of a quadrilateral
This article lists several calculators for area of a quadrilateral

- Bayes’ theorem
This online calculator calculates posterior probabilities according to Bayes’ theorem.

- Bernoulli trials table
This online calculator calculates probability of k success outcomes in n Bernoulli trials with given success event probability for each k from zero to n.

- Bisection method
The bisection method in mathematics is a root-finding method that repeatedly bisects an interval and then selects a subinterval in which a root must lie for further processing. The method is also called the interval halving method.

- Combinations generator
This online calculator generates all possible combinations of items from different sets/lists

- Complex numbers
The calculator displays complex number and its conjugate on the complex plane, evaluate complex number absolute value and principal value of the argument . It also demonstrates elementary operations on complex numbers.

- Complex polynomial value calculation
The calculator evaluates polynomial value. The polynomial coefficients can be either real or complex.

- Cramer's Rule
This online calculator solves system of linear equations using Cramer's rule and shows detailed steps of the solution

- Distance and midpoint between two points
This online calculator find distance and midpoint between two points in cartesian coordinates.

- Factoring calculator
This calculator generates all pairs of factors for given integer.

- False position method
False position method - is a root-finding algorithm that uses a succession of roots of secant lines combined with bisection method to approximate a root of a function f.

- Function graphs
The calculator plots several function graphs on the single coordinate plane.

- Gamma function
Calculation of the Gamma function using Lanczos approximation

- Gaps and missing numbers finder
This online calculator helps you find gaps and missing numbers in a sequence of numbers.

- Gaussian elimination with fractions
This online calculator solves systems of linear equations using row reduction (Gaussian elimination) while retaining fractions on all calculation stages. At the end, it returns the results in two forms - as a floating point numbers and as a fractions (with numerator and denominator)

- Generator of combinations which satisfy a condition
For elements with weights this calculator can filter out all combinations where total weight is under the specified limit.

- How many circles of radius r fit in bigger circle of radius R
This calculator estimates how many circles of radius r can be placed inside another circle of radius R.

- Integer factorization. Trial division
Integer factorization using trial division algorithm.

- Is a point in a triangle?
The calculator determines if an arbitrary point lies inside 2D triangle. The triangle is defined by 3 cartesian coordinate pairs.

- Level of liquid in the cylindrical tank, AKA Quarter-Tank Problem
This online calculator finds the height above the bottom of a horizontal cylinder (such as a cylindrical gas tank) to which the it must be filled for it to be full at specified percentage (for example, one quarter full amounts)