Question

calcule o valor de x aplicando o teorema de pitágoras

Answer 1

h²=c²+c²
15²=12²+x²
225=144+x²
225-144=x²
81=x²
√81=x
9=x

Answer 2

$\large \boxed{ \begin{array}{l} a {}^{2} = b {}^{2} + c {}^{2} \\ 15 {}^{2} = 12 {}^{2} + x {}^{2} \\ 225 = 144 + x {}^{2} \\225-144=x^2 \\ 81 \: = \: x {}^{2} \\ x = \sqrt{81} \\ x = 9\end{array}}$