Description & Comments



The picture shows an equilateral triangle.
There is also a smaller equilateral triangle inside it.
The two triangles have a vertex in common.
The big triangle is a rescaling of the small triangle by a factor \(3\).
There is also a segment from one vertex of the big triangle to a vertex of the small triangle (that are not the common vertex).

COMMENT: We suppose that the side length of the big triangle is \(1\) because it is easy to rescale lengths and areas.