Question

20 X 45° triangulo e retangulo
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Answer 1

Resposta:

28,28

Explicação passo a passo:

sen45°= $\frac{20}{x}$

$\frac{\sqrt{2} }{2}$= $\frac{20}{x}$

√2x=40

x=$\frac{40}{\sqrt{2} }$

x= $\frac{40}{\sqrt{2} } . \frac{\sqrt{2} }{\sqrt{2} }$

x= $\frac{40\sqrt{2} }{2}$

x=20√2

x= 20.1,41

x≅28,2