Source
\renewcommand{\arraystretch}{1.35}
\dispo{1}{\Eqalign{ A&=9+4=\circlenode{A}{13}\cr B&=3\times4\times5=\ldots\cr C&=19-7=\ldots\cr D&=15-10=\ldots\cr E&=3\times\ldots=21\cr F&=25\times4\times10=\ldots\cr G&=4\times4=\ldots\cr }}{%
\begin{tabular}{*{6}{c|}>{\columncolor[cmyk]{0,0,1,0}}c|*{7}{c|}}
\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}&\multicolumn{1}{c}{\phantom{\ding{176}}}\\
\cline{4-9}
$A$&\multicolumn{2}{c|}{}&\rnode{B}{T}&R&E&I&Z&E\\
\cline{4-14}
$B$&\multicolumn{5}{c|}{}&&&&&&&&\\
\cline{6-14}
$C$&\multicolumn{4}{c|}{}&&&&&\\
\cline{6-10}
$D$&\multicolumn{5}{c|}{}&&&&\\
\cline{6-10}
$E$&\multicolumn{4}{c|}{}&&&&\\
\cline{5-9}
$F$&\multicolumn{3}{c|}{}&&&&&\\
\cline{3-9}
$G$&\multicolumn{1}{c|}{}&&&&&\\
\cline{3-7}
\end{tabular}
}
\par\vspace{4mm}\par
Triangle qui a \dotfill : \_ \_ \_ \_ \_ \_ \_
\renewcommand{\arraystretch}{1}
\nccurve[linestyle=dashed,angleB=180,linecolor=gray]{->}{A}{B}