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
Grade 8 Math The importance of Grade 8 is self-evident. In Grade 8, subjects like physics are introduced, and geography and biology will also have graduation exams, significantly increasing the academic burden on children. To avoid falling behind, both previewing and reviewing work cannot be neglected. Today, Teacher Wang shares a special training on congruent … Read more
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