In the above mentioned scenario, Sonia uses the rhetorical appeal of Logos.
Explanation:
There are basically three types of rhetorical appeals: Ethos, Pathos, and Logos. In the above mentioned example, Sonia hava made use of Logos appeal to persuade the undergraduate students.
Logos is an appeal where the person try to convince its audience by the use of logic or reason. Sonia uses logos by presenting her theorems which means a true and factual statement accepted and proved by mathematical operations to the students.
Cultural experiences and perspectives can be conveyed through memorable narratives because their experiences and perspectives build who they are and contribute to their upbringing and memories.
Sir Agravain and Sir Mordred cry out to get witness when they enter Guinevere's room. They both want to prove Guinevere and Lancelot are traitors to King Arthur.