"This is an American living room."
Translation:هٰذا صالون أَمْريكِيّ.
In a nutshell, these two words belong to the demonstratives. All have the letter ذ pronounced "th like in the".
This - male singular = هذا hatha
This - female singular = هذه hathihi
These - two male persons = هذان hathan
These - two female persons = هاتان hatan
These - Plural above three (both male & female) = هؤلاء ha'oula'
There are others, and there is another group for far demonstratives (that, those).
In the lesson, the word صالون is masculine, although it is not an original Arabic word (it is frensh from Salon), and should have been written "هذه غرفة جلوس أمريكية".