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作图题是考查学生动手操作能力的重要题型之一.现在许多作图题不仅仅只停留在尺规作图、方格内作图上,更多的是要巧妙利用已学过的概念、性质、定理等知识作图,这大大加大了作图题的难度,也提高了学生知识的理解、掌握、运用程度.下面列举几道利用圆的相关性质来作图的题目,希望对同学们的学习有所启发.例1如图1,已知ABC是⊙O的内接
Drawing questions is one of the important questions to test students’ abilities to operate.Now many of the questions are not only in the rules and regulations, but also make clever use of concepts , Nature, theorem and other knowledge mapping, which greatly increased the difficulty of drawing questions, but also improve the students’ understanding, mastery, use of knowledge level.Considering the use of several related to the nature of the circle to draw the title, I hope Inspired by the students’ learning. Example 1 As shown in Figure 1, it is known that ABC is the internal connection of ⊙O