Question

Answer should be 5cm,someone please help!!​

Answer 1

${(lt)}^{2} = {(lp})^{2} + ({pt})^{2} \\ {(lt})^{2} = {3}^{2} + {4}^{2} \\ ( {lt)}^{2} = 9 + 16 \\ lt = \sqrt{25} = 5 \: cm$