"That has reached up to three meters in length."

Translation: Cela a atteint jusqu'à trois mètres de longueur.

[petemehegan]

Another mistake? Ça a atteint is an error, but Cela a atteint is correct? Explain, please!

[STRADS1551]

Yes, can somebody please explain why "ça" can't be used?

[Ripcurlgirl]

I don't know - something to do with euphony, perhaps?

[petemehegan]

No...this is simply an arbitrary call that is being overlooked for far more weighty matters of deeper grammatical mysteries. No biggy.

[CSA_GW]

Must this statement use "cela" for "that" and nothing else? and if yes, WHY please?

I thought about many French words for "that" and have tried 6 or 7 but none is accepted by duo.

[Dubnowalos]

Ça a atteint jusqu'à trois mètres de longueur rejected in favour of cela. Am I wrong in thinking that ça and cela are interchangeable?

[coto.i]

I've read that "ça" is actually the short form of "cela". So I expected them too to be interchangeable.

[petemehegan]

They are interchangeable...This is a thread that is getting ignored, and I do not mean that in a critical way. These mods have a lot on their hands. Go with what they're looking for, with the satisfaction of knowing you're right, and when you want to, report it again...

[lancebretthall]

So a specific measurement like "three meters in length" uses de ("trois mètres de longueur"), but using a measurement as an adverb, like "comfortable in length" uses en, ("confortable en largeur")?

[danabanov]

WHY is "ça" not accepted?

[petemehegan]

It should be...just know that you're right.

[danabanov]

Why isn't "Ça" acceptable here?

[petemehegan]

See above...you're right, and it's not accepted yet on DL.