A Web of Confocal Parabolas in a Grid of Hexagons
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If one erects regular hexagons upon the sides of a triangle T, several surprising properties emerge, including: (i) the triangles which flank said hexagons have an isodynamic point common with T, (ii) the construction can be extended iteratively, forming an infinite grid of regular hexagons and flank triangles, (iii) a web of confocal parabolas with only three distinct foci interweaves the vertices of hexagons in the grid. Finally, (iv) said foci are the vertices of an equilateral triangle.
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