Question

calcule o x:
|\
| \
|__\​

Answer 1

Teorema de Pitágoras:

$h {}^{2} = c {}^{2} + c {}^{2} \\ \\ 25 {}^{2} = 20 {}^{2} + x {}^{2} \\ \\ 625 = 400 + x {}^{2} \\ \\ - x {}^{2} = 400 - 625 \\ \\ - x {}^{2} = - 225 \: \: \: . \: ( - 1) \\ \\ x {}^{2} = 225 \\ \\ x = \sqrt{225} \\ \\ \boxed{\boxed{\boxed{x = 15}}}$

Answer 2

Explicação passo-a-passo:

a²=b²+c²

25²=x²+20²

625=x²+400

625-400=x²

225=x²

$x = \sqrt{225} = 15$