Question

De acordo com o Teorema Pitágoras, encontre o valor de X:

Answer 1

b²+c² = a²

x² +21² = 29²

x² +441 = 841

x² = 841 - 441

x² = 400

x = √400

x = 20

Answer 2

$\large \boxed{ \begin{array}{l} 29 {}^{2} = 21 {}^{2} + x {}^{2} \\ 841 = 441 + x {}^{2} \\ 841 - 441 = x {}^{2} \\ 400 \: = \: x {}^{2} \\ x = \sqrt{400} \\ x = 20\end{array}}$