\coordinate (X) at (3,5) \node (X) at (3,5) {}

(x,y) (θ:r) {%snippetview.tikz.coordinate.uselibrary.before%}calc{%snippetview.tikz.coordinate.uselibrary.after%} ($ (A) + {sin(60)}*(B) $) ($ (A)!.25!(B) $) ($ (A)!3cm!30:(B) $) ($ (A)!(B)!(C) $) Using positioning library \node[above=1cm of node.north]

å\path (A) -- (B)       -- (C)       -- cycle \path (A) to[out=θ, in=θ] (B) \path (A) to[bend left=θ] (B) \path (A) rectangle (B) \path (A) circle (r) \path (A) ellipse (3 and 2) \path (A) arc(θ1:θ2:r) (B) \path (A) arc(θ1:θ2:r1 and r2) (B) \path (A) .. controls (C1) and (C2) .. (B) \path (A) grid (B);