Introduction to Triangles
This section introduces triangles as a fundamental geometric shape formed by three intersecting lines, defined by three sides, three angles, and three vertices. For instance, a triangle labeled as
delta ABC, where AB, BC, and CA are the sides and angles are denoted as β A, β B, β C. The relationships between the sides and angles are pivotal as they contribute to properties explored in this chapter, specifically focusing on the congruence of triangles. The significance and applications of congruence are highlighted through everyday examplesβsuch as identical photographs and congruent shapes in objects we use daily. Using these examples, students are encouraged to consider additional instances of congruent figures, preparing them for deeper investigations into congruence rules and triangle properties.
