矩形中的半圆
几何画板及绘图内容加载中,请稍等……
①本范例演示在矩形内绘制多个半圆的几何构造;②涉及的核心数学概念包括矩形、平移、反射、极限和几何作图;③作图要点——从下方『构造摘要』提炼用到了Segment(线段)、Circle(圆)、Intersect(交点)、Semicircle(半圆)、CircleArc(圆弧)、CurveCartesian(笛卡尔曲线)等GeoGebra命令/对象;④适合高中数学教学,用于展示几何变换和极限思想。
GeoGebra 命令及参数
Segment(B, A) → fCircle(C, 6) → cCircle(E, 6) → dIntersect(c, d) → F, G, ,Segment(B, H_1) → gSegment(H_1, H) → hSegment(H, A) → iSemicircle(D, A) → eSemicircle(B, D) → kSemicircle(H, H_1) → pSemicircle(H_1, B) → qIntersect(r, f) → I, J_1CircleArc(A, H, I) → sIntersect(s, k) → J, , ,CurveCartesian(-3 + (2 * cos(t)), -2 + (2 * sin(t)), t, ((-π)) / 2, t1) → c1CurveCartesian(-3 + (2 * cos(t)), 2 + (2 * sin(t)), t, ((-π)) / 2, t2) → c2CurveCartesian(-3 + (4 * sqrt(2)) + (4 * cos(t)), (4 * sin(t)), t, π / 2, t3) → c3CurveCartesian(-3 + (2 * sqrt(2)) + ((2 * sqrt(2)) * cos(t)), 4 - ((2 * sqrt(2)) * sin(t)), t, 0, t4) → c4CurveCartesian(x(A) + (i * cos(w)), y(A) + (i * sin(w)), w, 0, t) → a