数学世界是令人惊奇的世界,几何世界更常让人拍案叫绝.下面列举几个几何图形的例子,简单介绍一下.首先随意画出两个大小不一的圆,从每个圆心向另一个圆作两条切线(图1).如果这时把切线与圆的交点(不是切点)连接起来,就能得到一个矩形!这真有点意外,但对它的证明并不难.可是至今也弄不清是谁首先发现了这件奇事. The world of mathematics is a surprising world, the geometric world is more often make a racket. Here are a few examples of geometric shapes, a brief introduction. First free to draw two different sizes of circles, from each center to another Circle for two tangents (Figure 1) .If at this time the intersection of the tangent and the circle (not the tangent point) connected to get a rectangle! This is a bit unexpected, but its proof is not difficult, but so far It is unclear who first discovered this wonders.