Question 1

Since this lesson is about the rate-marking preposition a, why doesn't this sentence use a (like al metro)?

Accepted Answer

The preposition a is used for rates, such as price per unit (e.g., costa cinque euro al metro — it costs five euros per meter). This sentence, however, is stating a fixed physical dimension, not a rate. To state a static measurement, Italian uses the verb essere followed by the preposition di.

Question 2

Why do we say è di un metro instead of just è un metro?

Accepted Answer

While in English we simply say a dimension "is" a certain measurement, Italian requires the preposition di after essere to express exact dimensions, weights, or quantities. You are literally saying that the width "is of one meter."

Question 3

How would I say "The lining is one meter wide" using an adjective instead of the noun larghezza?

Accepted Answer

You would say La fodera è larga un metro. Notice that when you use the adjective (largo/a) to describe the subject directly, you drop the preposition di.

Question 4

How is the word larghezza formed, and what are the equivalents for length and height?

Accepted Answer

It is formed by taking the adjective largo (wide) and adding the suffix -ezza, which creates abstract nouns representing a quality (similar to "-th" or "-ness" in English). The exact same pattern is used for lunghezza (length, from lungo) and altezza (height, from alto).

La larghezza della fodera è di un metro.

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