# The Plastic Brain

If you’re a cabinet maker, geometry is essential to all of the lengths and angles that you calculate. The cabinet shown here goes further and presents the solution to a rather difficult dissection problem. This is the simplest perfect squared square. The entire area is a square and it is divided into squares of distinct integer sizes.

Via cab1729

The Squared Square

Shining a torch on a wall is a good way to see the conic sections in real life. Can you spot a circle, the ellipses, a parabola and the hyperbolas? [code] [more]

Via

matthen

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“Endless forms most beautiful”

Via jsacc001

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A geometric construction of the parabola

A geometric construction of the parabola. The blue point is called the focus, and the horizontal line is the directrix. The blue lines show all the points which are at an equal distance from the red point and the blue focus point. The point of the blue line directly above the red dot contributes to the parabolic curve, because the parabola is defined as the set of all points equidistant to the focus and the directrix. [more] [code]

Awesomeee!!

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