$\def\arraystretch{1.25} \begin{array}{c|c|c|c|c}a & c & h & A \\\hline4 \mathrm{cm}& 8\mathrm{cm} & 5\mathrm{cm} & ?\end{array}$

$\def\arraystretch{1.25} \begin{array}{c|c|c|c|c}a & c & h & A \\\hline3 \mathrm{cm}& 4\mathrm{cm} & 4{,}5\mathrm{cm} & ?\end{array}$

$\def\arraystretch{1.25} \begin{array}{c|c|c|c|c}a & c & h & A \\\hline5 \mathrm{dm}& 14\mathrm{cm} & 2\mathrm{dm} & ?\end{array}$

$\def\arraystretch{1.25} \begin{array}{c|c|c|c|c}a & c & h & A \\\hline6 \mathrm{cm}& 4\mathrm{cm} & ? & 25 \mathrm{cm}\end{array}$

$\def\arraystretch{1.25} \begin{array}{c|c|c|c|c}a & c & h & A \\\hline1{,}5 \mathrm{cm}& 3{,}5\mathrm{cm} & ? & 11{,}25 \mathrm{cm} \end{array}$

$\def\arraystretch{1.25} \begin{array}{c|c|c|c|c}a & c & h & A \\\hline? & 4\mathrm{cm} & 5\mathrm{cm} & 30 \mathrm{cm}\end{array}$