Which of the following are among subject areas included in trivium?

The trivium is a traditional system of education that focuses on three core subjects:

* Grammar: This involves the study of language, including its structure, rules, and usage. It also encompasses logic and rhetoric.

* Logic: This focuses on the art of reasoning and argumentation, helping students to think critically and identify fallacies.

* Rhetoric: This involves the art of effective communication, including public speaking, writing, and persuasion.

Therefore, the subjects included in the trivium are:

* Grammar

* Logic

* Rhetoric

It's important to note that the trivium doesn't encompass subjects like math, science, or history. These are part of the quadrivium, which is the next level of education after the trivium.