摘要
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 rotation projection principle of descriptive geometry,a new method to construct an ellipse is presented by use of the right triangle principle to draw the minor axis and the rotating projection methed to draw the ellipse.
出处
《河北科技大学学报》
CAS
2000年第2期52-54,共3页
Journal of Hebei University of Science and Technology
关键词
椭圆
直角三角形法
轴测投影
旋转投影法
作图
ellipse
right triangle principle
axonometric projection
rotation projecion method
