Question

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Answer 1

Resposta:

a) x = 5

c) x = $\sqrt{7}$

Explicação passo a passo:

a) Usa a regra de Pitagoras:

$3^{2}$ + $4^{2}$ = $x^{2}$  -->

9 + 16 = $x^{2}$  -->

25 = $x^{2}$  --> x = $\sqrt{25}$  --> x = 5

c) $x^{2}$ + $3^{2}$ = $4^{2}$  -->

$x^{2}$ + 9 = 16  -->

$x^{2}$ = 16 - 9  -->

$x^{2}$ = 7   --> x = $\sqrt{7}$