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几何画板如何绘制爱心？几何画板爱心函数教程

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　　几何对于很多学生来说，估计是一个噩梦般的存在，但其实几何学好了也可以很浪漫，比如我们可以使用函数绘制出爱心图形，当然这得借助第三方工具，如几何画板这样一款数学物理通用的教学软件。那么，几何画板如何绘制爱心呢？下面，我们就一起往下看看吧！

　　方法步骤

　　1、打开几何画板数学几何绘图软件，在上方菜单栏点击“绘图”——“定义坐标系”，这样坐标系就显示出来了，然后再次点击“绘图”，将网格样式改为极坐标网格；

　　2、输入心形函数。按快捷键Ctrl+G打开新建函数窗口并输入如下图所示的函数。这里也可以输入其他的心形图像函数；

　　3、输入完成后，点击确定，这时会弹出以下三角函数窗口，点击是；

　　4、这样就可以自动画出函数图像，如下图所示；

　　5、选中函数图像鼠标右键，点“属性”，在弹出的窗口打开绘图选项，取消勾选“显示箭头和端点”；

　　6、接着隐藏不需要的东西。按Ctrl+A选择所有对象，然后按住Ctrl单击图像取消选中，然后按Ctrl+H把别的对象隐藏。如果不需要上色，可以到此为止；

　　7、构造线段。选择线段工具按住Shift画一条水平线段（左端点在爱心左端点的左边，右端点在爱心右端点的右边）。使用点工具在线段上构造一点O。接着过点做直线的垂线，构造其与爱心的两个交点A/B，构造线段AB；

　　8、依次点击点O和线段AB。点击“构造”——“轨迹”命令，就可以将爱心涂上颜色了；

　　9、如果不够清晰，选中函数图像，鼠标右键，多次点击“提高分辨率”即可，隐藏不需要的东西；

　　10、最后选中图像，执行“显示”——“颜色”改一下爱心内部的颜色;接着执行“显示”——“线型”将外围（函数图像）改为粗线即可。最后的完成效果如下图所示，大家可以保存或者截图。

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