Question

preciso de ajuda pfvr​

Answer 1

Resposta:

Explicação passo a passo:

1-

$a^2=1^2+1^2\\a=\sqrt{2}$

2-

$25^2=20^2+x^2\\625=400+x^2\\x^2=400-625\\-x^2=-225\\Multiplicamos,por,-1\\x^2=225\\x=\sqrt{225} \\x=15$

Figura 2:

$x^2=9^2+12^2\\x^2=81+144\\x^2=225\\x=\sqrt{225} \\x=15$

3-

Não tem pergunta!!!!!

4-

$x^2=3^2+1^2\\x^2=9+1\\x=\sqrt{10}$

b)

$15^2=12^2+x^2\\225=144+x^2\\-x^2=144-225\\-x^2=-81\\*-1\\x^2=81\\x=\sqrt{81}\\x= 9$