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1引言几何画板、超级画板都是成功的动态几何软件,都有很好的教育价值.在使用动态几何的过程中,我们深刻地感受到:使用信息技术并不是比拼技术的熟练与否,能否制作有创意的作品源于对数学知识的深刻理解.一个精当的例子胜过一打说明.我们以制作椭圆、双曲线、阿波罗尼斯圆和卡西尼卵形线为例来说明.2问题我们知道,加、减、乘、除四则运算,可以分别对应于四种不同曲线(设两定点间的距离为2c>
1 Introduction Geometry drawing board, super drawing board are successful dynamic geometry software, have very good educational value.In the process of using dynamic geometry, we deeply feel: the use of information technology is not skilled or not, can No Producing creative work stems from a deep understanding of mathematical knowledge. A good example outweighs a dozen explanations. Let’s illustrate oval, hyperbolic, Apollonian and Cassini oval lines for example .2 The problem we know, add, subtract, multiply, divide addition four arithmetic, can correspond to four kinds of different curves respectively ’Set the distance between two fixed points as 2c>