Examples for

Plane Geometry

Plane geometry refers to the subcategory of geometry that considers figures in a plane. Wolfram|Alpha can answer your questions about figures in a plane such as circles, angles, polygons, etc.

Plane Figures

Compute properties of a simple plane figure.

Compute properties of a plane figure:

Specify parameters for a figure:


Compute properties of a triangle, quadrilateral or regular n-gon.

Compute properties of a triangle with given side lengths:

Compute properties of a regular polygon:

Specify parameters for a regular polygon:

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Compute the complement, supplement and reference angles in both degrees and radians.

Compute the complement of an angle:

Compute the supplement of an angle:

Do computations with complementary angles:

Compute a reference angle:

Planar Laminae

Compute properties for planar laminae.

Get information about a planar lamina:

Find a moment of inertia for a lamina:

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Step-by-Step Solutions for Geometry


  • Conic Sections
  • Coordinate Geometry
  • Polyforms
  • Solid Geometry
  • Tilings
  • Golden Ratio Formula

    Compute side lengths of golden rectangles.

    Determine golden ratio numbers and lengths: