In the given figure $\triangle \mathrm{ABC}$ is shown. DE is parallel to BC . If $A D=5 \mathrm{~cm}, D B=2.5 \mathrm{~cm}$ and $B C=12 \mathrm{~cm}$, then DE is equal to
Explanation
Since DE is parallel to BC, the corresponding angles are equal. Therefore, angle ADE is equal to angle ABC. Using the properties of similar triangles, we can find the length of DE.
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