Regular Polygon

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A regular polygon is a polygon in which the sides are all the same length and the angles all have the same measure.

Regular polygon is an elementary-school-level concept. It is listed in the California State Standards for Grade 3.


Equilateral Triangle: A triangle in which all three sides are of equal length. In such a triangle, the angles are all equal as well.
Square: A square is a polygon with four sides of equal length and at right angles to each other.


Polygon: A polygon is a two-dimensional figure that consists of a collection of line segments, joined at their ends.

Classroom Articles on Polygons

  • Decagon
  • Parallelogram
  • Dodecagon
  • Pentagon
  • Hendecagon
  • Quadrilateral
  • Heptagon
  • Rectangle
  • Hexagon
  • Right Triangle
  • Isosceles Triangle
  • Trapezoid
  • Nonagon
  • Triangle
  • Octagon

  • Classroom Articles on Geometry (Up to Elementary-School Level)

  • Acute Angle
  • Parallel
  • Angle
  • Perimeter
  • Area
  • Perpendicular
  • Circle
  • Point
  • Cone
  • Prism
  • Cube
  • Pyramid
  • Cylinder
  • Radius
  • Diameter
  • Sphere
  • Geometric Construction
  • Surface Area
  • Obtuse Angle
  • Volume