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纵观各地数学中考题,众多压轴题多以图形运动为主,而用我们熟知的三角板为运动对象,巧妙创设命题情境,进而构造一系列问题串,以考查学生的综合运用能力.下面举例供同学们学习和复习时参考.一、以单只三角板为运动背景的图形运动问题例1(2013年湖北省宜昌市中考题)如图1(1),平面之间坐标系中,等腰直角三角形的直角边BC在x轴正半轴上滑动,点C的坐标为(t,0),直角边AC=4,经过O,C两点作抛物线y_1=ax(x-t)(a为常数,a>0),该抛
Throughout the math test questions around, many of the finale questions mostly graphic motions, but with our well-known triangle board as the object of movement, clever creation of the proposition context, and then construct a series of questions in order to test the students’ comprehensive utilization ability. Students learn and review reference First, the single triangle board as the background of the movement of the graphics Example 1 (Yichang City, Hubei Province 2013 senior high school entrance examination questions) Figure 1 (1), between the plane coordinate system, isosceles right angle The right-angled side BC of the triangle slides on the positive semi-axis of the x-axis. The coordinate of point C is (t, 0) and the right-angled side AC is 4. After parabola y_1 = ax (xt) a> 0), the throw