圆柱体尺寸变化演示
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①本范例演示圆柱体在不同底面半径和高变化时的形态与尺寸;②涉及核心数学概念包括圆柱体体积公式V=πr²h、表面积公式A=2πrh+2πr²;③作图要点运用了Line, Point, Ellipse, Vector, Translate, Intersect, Segment, PointIn, Midpoint, Circumference等GeoGebra命令与对象构建圆柱体及动态元素;④适合高中立体几何教学,用于直观理解体积与表面积计算及参数影响。
GeoGebra 命令及参数
Line(A, B) → aLine(A, C) → bPoint(b) → DEllipse(A, D, E) → cPoint(a) → FVector(A, F) → uTranslate(c, u) → c'Line(F, b) → dIntersect(c', d, 1) → GIntersect(c, b, 1) → HIntersect(c', d, 2) → IIntersect(c, b, 2) → JSegment(H, G) → eSegment(I, J) → fPointIn(c') → Pointc'Intersect(c, e, 1) → KSegment(K, D) → hMidpoint(h) → LPoint(c) → MIntersect(c, e, 1) → PIntersect(c, f, 1) → NSegment(P, N) → iMidpoint(i) → OVector(O, P) → vCircumference(c) → circumferencecPointIn(c) → Pointc_1PointIn(c) → PointcSegment(O, P) → k