Wolfram|Alpha Plane Geometry Calculators

Wolfram|Alpha has plane geometry calculators. Solve problems related to lines and points, triangles, circles, polygons, ellipses, area, trigonometry and other mathematical surprises.

Plane Geometry

Circles
Arc Length on a Circle CalculatorChord of a Circle CalculatorCircle Area CalculatorCircle Area Using Diameter CalculatorCircle CalculatorCircle Sector Area CalculatorCircumference Formula Calculator
Ellipses
Eccentricity of an Ellipse CalculatorEllipse Area Calculator
Lines & Points
Distance CalculatorEndpoint CalculatorLine CalculatorMidpoint CalculatorRise and Run of Slopes CalculatorSlope of a Line Calculator
Mathematical Surprises
Golden Ratio Formula CalculatorLissajous Curve CalculatorSuperellipse CalculatorSuperformula Calculator
Polygons
Area of a Regular n‐gon CalculatorRectangle Area CalculatorRoom Area CalculatorRoom Area in Units CalculatorTrapezoid Area Calculator
Triangles
Changing Shadow Length for a Local Light Source CalculatorHeron's Formula CalculatorPythagorean Theorem CalculatorShadow Length for a Local Light Source CalculatorShadow Length for Shadows Cast by the Sun CalculatorSides of a Right Triangle CalculatorTriangle Area Calculator
Trigonometry
Angle Subtended CalculatorLaw of Cosines CalculatorLaw of Sines CalculatorLaw of Tangents CalculatorTrigonometric Function Calculator