Definition: A polygon with three sides and three angles.

Alright class, settle down now, let’s take a look! You’ve asked a wonderful question, it’s truly quite astute, About the word “triangle,” let’s give it some fruit! The dictionary's right, you see, with its simple decree: “A polygon with three sides and three angles, for you and me!” Let’s break that down, nice and slow, so everyone can know – Polygon: That means a shape, perfectly planned, Made up of straight lines, carefully spanned. Three Sides: Just think of a triangle bright, Like the roofs on houses, shining with light! They meet in points, you see, a clever feat. And Three Angles: Each corner, sharp and keen, Adding up to one hundred eighty degrees, it’s often seen! So there you have it, my dears, a triangle's design – Three sides and three angles, truly divine! Do you understand now? Any questions to pose?