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$\mathrm{ABCD}$ is a rectangle with sides $\text{AB}=56 \mathrm{~cm}$ and $\text{BC}=45 \mathrm{~cm}$, and $\text{E}$ is the midpoint of side $\text{CD}$. Then, the length, in $\mathrm{cm}$, of radius of incircle of $\triangle \text{ADE}$ is

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