Question

E2.
Помогите пожалуйста!!!!!!​

Answer 1

$AB=sqrt{(-5-2)^2+(7-3)^2+(2-1)^2}= sqrt{49+16+1}=sqrt{66}\BC=sqrt{(1-(-5))^2+(5-7)^2+(3-2)^2}= sqrt{36+4+1}=sqrt{41}\CA=sqrt{(2-1)^2+(3-5)^2+(1-3)^2}= sqrt{1+4+4}=3$

$AB+BC+CA=boxed{sqrt{66} +sqrt{41} +3}$