Hexagon
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In geometry, a hexagon is a six-sided polygon. The total of the internal angles of any simple hexagon is 720°.
Giant's Causeway closeup
The ideal crystalline structure of graphene is a hexagonal grid.
Assembled E-ELT mirror segments
A beehive honeycomb
In geometry, straightedge-and-compass construction – also known as ruler-and-compass construction, Euclidean construction, or classical construction – is the construction of lengths, angles, and other
Straightedge and compass
A compass