Comprehensive Summary of Half-Angle Model Conclusions
Source: Teacher Xu (ID: xuguanghong76) 1. Basic Conclusions of the 45°–90° Half-Angle Model The 45°–90° Half-Angle Model is one of the most important models in junior high school geometry, involving knowledge points such as the criteria and properties of congruent triangles; isosceles triangles; area transformation; Pythagorean theorem; criteria and properties of parallelograms; cyclic quadrilaterals; rotation; … Read more