组合图形是指两种或两种以上基本图形组合起来的几何图形。这是教学中的难点,因为解答组合图形不仅需要熟练地掌握解答基本几何图形的知识,更重要的是还要有识别图形,能正确分割、拼凑、平移、旋转以及重新组合图形的能力。要提高学生的解题能力,关键是要训练学生掌握正确的题解思路,并在教师精心指导下形成熟练的解题技能技巧。 1.分割。即把组合图形分割成几个简单的图形,分别求解,最后相加或相减。 Combined graphics are geometric shapes that combine two or more basic graphics. This is a difficult point in teaching, because answering combined graphics not only requires mastery of the knowledge of solving basic geometric shapes, but more importantly, it also has the ability to identify, patch, translate, rotate, and recombine graphics. To improve students’ problem-solving abilities, the key is to train students to master the correct solution ideas and form skilled problem-solving skills under the meticulous guidance of teachers. 1. Split. That is, the combined graphics are divided into several simple graphics, solved separately, and finally added or subtracted.