"Os muros são vermelhos."

Translation: The walls are red.

[curiousminds]

Muros=paredes?
Is this perhaps a difference between outside walls (of the house) and inside walls (of a room)?

[Davu]

Almost right. See: http://www.duolingo.com/comment/546307

[curiousminds]

Thank you! interesting way of differentiating walls, I guess :)

[BGMarc]

Can someone please answer this without linking to another comment? The app doesn't let you follow the link

[Davu]

This is an answer from Paulenrique: "Muro has no ceiling over it. So inside a house you have paredes. What separates your house from your neighbor's is um muro".

[Coayuco]

It is the same in Spanish - muro and pared.

[LadyMar1923]

Interesting that the picture Duo gives for parede is an outside free-standing wall and the Great Wall in China!

[Davu]

Oh really? I've come across a few misleading pictures too. It is worth hitting the "Report a problem" button in these cases I think. Oh, if you do have any doubts about the "wall" words see danmoller's note here: https://www.duolingo.com/comment/822409.

[galletadecolores]

Very useful!

[pereszera]

why not "these walls are...?"

[Paulenrique]

= Estes muros são...