Question

Me ajudem por favor...

Answer 1

01)

$a^2=b^2+c^2\\d^2=(1,2)^2+(1,6)^2\\d^2=1,44+2,56\\d^2=4\\d=\pm\sqrt{4}\\\boxed{d=2\;m}\\d=-2 \;m\;(n\~ao\;conv\^em)$

02)

Calculando a base do triângulo (x):

$a^2=b^2+c^2\\x^2=20^2+15^2\\x^2=625\\x=\pm\sqrt{625}\\\boxed{x=25\;cm}\\x=-25\;cm\;(n\~ao\;conv\^em)$

Calculando o perímetro:

$(2P)=20+15+15+15+25\\\boxed{(2P)=90\;cm}$

Bons estudos!