This paper studies the areaofplane closed folding by complex number method and proves several propositions about areaofplane closed folding.
利用平面闭折线有向面积的概念和行列式的性质推广了一个面积问题。
2
According to principle of descriptive geometry, the areaofplane equals projection of the plane divided by cosine between plane and projection of plane.
由画法几何原理可知平面面积等于其正投影面积乘以该平面与投影面夹角的余弦。
3
The plane, which was full of fuel, scattered flaming fragments over a large area.