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三角板除了可以替代直尺画直线之外,还有其它的用途.1.拼特殊的角如图1所示,我们可以拼出15°的∠1和165°的∠2.事实上,我们可以利用一
Triangle can be used in addition to straight lines instead of rulers. 1. Spelling special corners As shown in Figure 1, we can spell 15° ∠ 1 and 165° ∠ 2. In fact, we can Use one