Not exactly. You just need to sample 3 equidistant points along the edges of the Voronoi cells and draw triangles with it. You can use the dividePLine function I used in this other sketch.
For example:
tri = dividePLine(vertices, 3, true);
where:
verticesis a list of the vertices of a single Voronoi cell3, the desired number of equidistant pointsfalse/true, a boolean indicating whether the polyline (edges of the Voronoi cell) is closed or not