Question

Please answer this question fast

Answer 1

Answer:

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Answer 2

Answer:

By Pythagoras theorem in triangle ABC

${bc }^{2} = {ac}^{2} - {ab}^{2}$

therefore,

${bc}^{2} = {5}^{2} - {4}^{2}$

${bc}^{2} = 25 - 16 = 9$

$bc = 3cm$