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教学内容:三角形内角和(教材第53页)教具学具准备:师生都用纸做几个三角形。并用量角器准确地量出各角的度数标在对应角上。教学目标:1、记住三角形内角和等于180°。
Teaching content: Triangle angle and (textbook page 53) Teaching aids Preparation: teachers and students do a few triangles with paper. And use the protractor accurately measure the degree of each corner marked at the corresponding angle. Teaching Objectives: 1, Remember that the internal angle of the triangle is equal to 180 °.