三角形内角和定理３１６０００浙江省定海一中刘承禹重视发展学生素质的数学教学，就是要求在讲解、学习每一个“个”的时侯，时时注意到努力把学生的思维了！导到它的“类”．三角形内角和定理的“类”是几何定值问题，具体一点是：几个角的和是定值的问题．本设计牢牢把... Triangle inner angle and theorem 316000 Zhejiang Cheng Dinghaizhongzhong Liu Chengyu attaches great importance to the development of student quality mathematics teaching, that is, when asked to explain, learn every “one”, always pay attention to the students’ thinking! Lead to its “class”. The “class” of the triangle internal angle and theorem is a geometric fixed value problem. The specific point is that the sum of several angles is a fixed value problem. This design firmly put ...