地球作为球体 by WONG FAU CHOO
几何画板及绘图内容加载中,请稍等……
①这个范例演示了地球作为球体的几何模型与相关计算;②涉及的核心数学概念包括球体、立方体、切线函数、根、比例和数字;③作图要点——从下方『构造摘要』提炼用到了 Circle(圆)、Segment(线段)、PointIn(点在...内)、Intersect(交点)、CircleSector(扇形)、Angle(角度)、Point(点)、CircumcircleArc(外接圆弧)、Line(直线)等 GeoGebra 命令/对象;④适合高中及以上学生学习和理解球体相关几何性质及计算。
GeoGebra 命令及参数
Circle(N, E, S) → cCircle(D, E, C) → dSegment(N, S) → fPointIn(a) → GCircle(zAxis, G) → eCircle(N, G, S) → gIntersect(g, e) → H, I, ,Segment(G, I) → hIntersect(h, f) → JIntersect(e, c) → K, L, ,Intersect(d, g) → M, N_1, ,CircleSector(J, G, L) → pCircleSector(O, G, N_1) → qAngle(N_1, O, G) → αAngle(N_1, O, E) → βPoint(c) → PCircle(f, P) → rPoint(c) → QPoint(c) → RPoint(c) → S_1Point(c) → TCircle(f, Q) → sCircle(f, S_1) → tCircle(f, R) → c_1Circle(f, T) → d_1Point(d) → UPoint(d) → VPoint(d) → WPoint(d) → ZPoint(d) → A_1Circle(N, V, S) → e_1Circle(N, W, S) → f_1Circle(N, U, S) → g_1Circle(N, Z, S) → h_1PointIn(a) → AIntersect(h_1, g_1, 1) → BCircumcircleArc(N, A, S) → k_1Circle(f, A) → p_1Intersect(k_1, d) → B_1, C_1, ,CircleSector(O, A, B_1) → q_1Segment(O, B_1) → iLine(A, i) → jIntersect(j, f) → D_1Intersect(p_1, c) → E_1, F_1, ,CircleSector(D_1, E_1, A) → r_1