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探究导入今天我们利用《几何画板》一起来探索抛物线焦点弦的相关性质.请各位同学打开各自电脑桌面上的“抛物线.gsp”文件,已知抛物线y2=2px(p0),怎样作一条过焦点F的任意弦AB?学生动手操作:在抛物线上任取一点A,作过A、F两点的直线,同时选取直线和抛物线,然后打开“作图”,
Explore Import Today we use Geometry Sketchpad to explore the related properties of a parabolic focus chord.Store students to open the “Parabolic .gsp” file on their desktop, knowing that parabola y2 = 2px (p0), how to make a point of focus F arbitrary string AB? Students hands-on operation: take a little on the parabola A, A, F made two straight lines, and select the straight line and the parabola, and then open the “drawing”