# How to connect to the north anchors of triangular (leaf) nodes in tikz-qtree?

How to make the edges from x (resp. y) to connect to the north anchors of the triangular leaf nodes A and B (resp. C)?

Note that this should not change the edge style between x and y. Therefore, the solution with edge from parent path = {(\tikzparentnode) -- (\tikzchildnode.north)} is unsatisfactory.

\documentclass[tikz]{standalone}

\usepackage{tikz-qtree}
\usetikzlibrary{positioning, shapes.geometric}

\begin{document}
\begin{tikzpicture}[level distance = 35pt, sibling distance = 20pt,
edge from parent/.style = {
draw, edge from parent path = {(\tikzparentnode) -- (\tikzchildnode)}}]
\tikzset{every internal node/.style = {draw, circle, red, font = \Large}}
\tikzset{every leaf node/.style = {draw, blue, regular polygon, regular polygon sides = 3, inner sep = 1pt}}

\Tree [.$y$
\edge [red, very thick];
[.$x$
$A$
$B$
]
$C$
]
\end{tikzpicture}
\end{document}


You can add an explicit edge from parent path to your edge between x and y and use the .north path for the rest:

\documentclass[tikz]{standalone}

\usepackage{tikz-qtree}
\usetikzlibrary{positioning, shapes.geometric}

\begin{document}
\begin{tikzpicture}[level distance = 35pt, sibling distance = 20pt,
edge from parent/.style = {
draw, edge from parent path = {(\tikzparentnode) -- (\tikzchildnode.north)}}]
\tikzset{every internal node/.style = {draw, circle, red, font = \Large}}
\tikzset{every leaf node/.style = {draw, blue, regular polygon, regular polygon sides = 3, inner sep = 1pt}}

\Tree [.$y$
\edge [red, very thick,edge from parent path = {(\tikzparentnode) -- (\tikzchildnode)}];
[.$x$
$A$
$B$
]
$C$
]
\end{tikzpicture}
\end{document}