论文部分内容阅读
根据画法几何中的旋转重合原理，给出了利用直角三角形法求椭圆短轴及用旋转投影法画椭圆的新方法。
According to the principle of rotation coincidence in the painting geometry, a new method of using the right triangle method to find the ellipse short axis and drawing the ellipse by the rotation projection method is given.