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Alphabetical Index
New in MathWorld
Hexagon
A hexagon is a 6-sided polygon.
Hexagon is an elementary-school-level concept.
Classroom Articles on Polygons
Decagon
Pentagon
Dodecagon
Polygon
Equilateral Triangle
Quadrilateral
Hendecagon
Rectangle
Heptagon
Regular Polygon
Isosceles Triangle
Right Triangle
Nonagon
Square
Octagon
Trapezoid
Parallelogram
Triangle
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