Question

Na figura acima o valor de x é:

Answer 1

${y}^{2} = {9}^{2} + {12}^{2} \\ {y}^{2} = 81 + 144 \\ {y}^{2} = 225 \\ y = \sqrt{25 } \\ y = 15$
${15}^{2} = {x}^{2} + { \sqrt{56} }^{2} \\ 225 = {x}^{2} + 56 \\ {x }^{2} = 225 - 56 \\ {x}^{2} = 169 \\ x = \sqrt{169 } \\ x = 13$