Question

Calcule o valor de X
(ME AJUDEM pls!!!)

Answer 1

Resposta:

$hipotenusa~ao~quadrado=soma~dos~quadrados~dos~catetos\\ \\ d)\\ \\ (x~cm)^{2} =(12cm)^{2} +(5cm)^{2} \\ \\ (x~cm)^{2} =144cm^{2} +25cm^{2} \\ \\ x^{2} cm^{2} =169cm^{2} \\ \\ x^{2}=\frac{169cm^{2} }{cm^{2} } \\ \\ x^{2} =169\\ \\ x=\sqrt{169} \\ \\ x=13$

$e)\\ \\ 20^{2} =(4x)^{2} +(3x)^{2} \\ \\ 16x^{2} +9x^{2} =400\\ \\ 25x^{2} =400\\ \\ x^{2} =\frac{400}{25} \\ \\ x^{2} =16\\ \\ x=\sqrt{16} \\ \\ x=4$