Although I looked up in a good dictionary I could not find the complete use/ difference between the three words.
Kindly tell the differences between locate, situate and built. For example,
1- My school is situated in the middle of the city.
2- My school is built in the middle of the city.
3- My school is located in the middle of the city.
In your examples, situated and located are both connected with the idea of βwhere the school isβ.
The word βbuiltβ however is has to do with construction.
Therefore I would prefer your second sentence in the past tense (the construction of the school is finished): My school was built in the middle of the city.
Often, both is situated and is located can be replaced with just is.
In some countries people are taught in school that some expression or other in their own language MUST be translated as is situated. As a result, people go crazy with the expression, use it too much, and seldom use just the word is, which is the more common way of expressing location.