Talk:Triangular hebesphenorotunda

Vertex coordinates seem wrong
I think the vertex coordinates are wrong. I think that the first 3 have the wrong $y$ value. Given is $$\frac{3\sqrt{3}+\sqrt{15}}{12} \approx 0.75576$$, which is to low for the rest of the coordinates. I don't know what the correct value should be but I'm pretty sure the value given is wrong.