Answer and Explanation:
The rhetorical triangle is a diagram in the form of a triangle that where each edge represents one of the rhetorical elements of aristoteles, pathos, logos and ethos. This triangle shows how these three elements must be interconnected within a discourse.
We can use an example of a rhetorical triangle in Kennedy's inaugural speech, where he uses pathos to evoke the emotional side of his audience, expressing his commitment to the nation, the responsibility that the country has as a powerful nation and the country's commitment to smaller nations. He uses ethos to show that his actions will be aimed at social welfare, within the norms and moral values preached in the country as correct. He also uses logos, to show how nations must be allied with the USA in order to prosper, to have aid and not to generate conflicts and wars that only bring sadness.
The rhetoric triangle is attached.