Learn Farsi: ترنج در وسط و لچک‌ها در گوشه‌ها هستند. - The medallion is in the middle and the corner pieces are in the corners.

These are specialized artistic terms used almost exclusively when talking about traditional Persian carpets, bookbinding, or tilework. The ترنج is the large central medallion (often diamond or oval-shaped), and the لچک refers to the triangular pieces located in the corners of the main field.

Inanimate plural subjects usually take singular verbs in Farsi. Why does this sentence use the plural verb هستند?

While a simple inanimate plural like لچک‌ها can take a singular verb, this sentence features a compound subject (ترنج AND لچک‌ها). Compound subjects often trigger plural verbs. Furthermore, when a sentence emphasizes the distinct, separate physical locations of different items (one in the middle, others in the corners), Farsi speakers naturally lean toward using a plural verb.

Could we drop the preposition در before the location words وسط and گوشه‌ها?

Yes! In conversational Farsi, and even in casual writing, the preposition در (in) is frequently dropped before spatial nouns. It is very common and natural to say ترنج وسط و لچک‌ها گوشه‌ها هستند without changing the meaning at all.

Since this lesson covers عبارت است از (consists of / comprises), how could we use that structure to describe this carpet?

While our example sentence describes where the pieces are, you would use عبارت است از to define the pattern is made of. For example: (The design of this carpet consists of a medallion and four corner pieces). Notice how stays fixed regardless of the plural nouns that follow it.