matematicas visuales visual math

Steiner deltoid

Steiner probed that the envelope of the Wallace-Simson lines is a curve that has three cuspidal points that is tangent to the three sides ant to the three altitudes of the triangle. It is called the Steiner deltoid.

Clicking "Animation" we can see how the Steiner deltoid is generated.


Steiner deltoid is an hypocycloid
Steiner deltoid is a hypocycloid related with the nine point circle of a triangle.
The deltoid and the Morley triangle
Steiner Deltoid and the Morley triangle are related.