【正文】
abola: Parallel with one element line. 拋物線 P平行于一條輪廓素線; ③ Hyperbola:Parallel with the axis lines. 雙曲線 P平行于軸線; ② Ellipse: Inclined cutting plane with respect to the axis. 橢圓 P傾斜于軸線; ① Circularity: Perpendicular cutting plane. 圓形 P垂直 于軸線; 2)Analyze cone intersection 圓錐體截交線分析 Intersection 截交線形狀 請(qǐng)點(diǎn)擊鼠標(biāo)左鍵顯示后面內(nèi)容 5 ② Ellipse: Inclined cutting plane with respect to the axis. 橢圓 P 傾斜于軸線。 3 (3)Rectangle: Parallel cutting plane with respect to the axis. 矩形 截平面 P平行于軸線。Intersection of plane surfaces and curved solids 平面與曲面立體相交 Exercises 練習(xí)題 Characteristics of intersection lines 截交線的特性 請(qǐng)點(diǎn)擊相應(yīng)標(biāo)題顯示其內(nèi)容 The method of finding intersections 求截交線的方法 Procedure of drawing intersections 求截交線的步驟 2 1. Characteristics of intersection lines 截交線的特性 Cutting plane 截平面 Intersection line 截交線 請(qǐng)點(diǎn)擊鼠標(biāo)左鍵顯示后面內(nèi)容 Intersection of plane surfaces and curved solids 平面與曲面立體相交 Every point on the segments of an intersection line is mon segments to both the intersecting plane and surfaces of the solid. 截交線是截平面與立體表面的共有點(diǎn)的連線 。 Segments of the intersection line also form a closed plane area. 截交線是一條封閉的平面圖形。 (2)Ellipse: Inclined cutting plane with respect to the axis. 橢圓 截平面 P傾斜于軸線; (1)Circularity: Perpendicular