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三角板是学习几何的重要工具,它蕴藏着丰富的学习资源,以三角板为载体,可以设计出新颖独特的几何问题,本文列举五例.例1 如图1,一块含有30°角
The triangle board is an important tool for learning geometry. It contains a wealth of learning resources. The triangle board as a carrier can design novel and unique geometric problems. This article lists five cases. Example 1 As shown in Figure 1, a block contains a 30 degree angle.