六棱柱展开图与表面积计算
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本范例通过六棱柱的展开图(net)直观展示其表面积的计算过程。核心数学概念是立体几何中的棱柱展开与表面积公式,即六个矩形侧面面积加上两个六边形底面面积。作图要点:使用GeoGebra的Polygon命令构造底面六边形,Prism命令生成棱柱,Segment命令创建棱边,并通过Rotate和Mirror变换将各面展开到平面,形成完整的展开图。对象包括顶点A、B及面face1、faceBCHG等,便于观察每个面的形状和尺寸。适合中学几何教学,帮助学生理解立体图形与平面展开图的关系,并掌握表面积计算的实际应用。
GeoGebra 命令及参数
Polygon(A, B, 6, xOyPlane) → poly1, a, F, b, c, d, e, f, C, D, EPrism(poly1, A + (0, 0, 4)) → g, G, faceEFKJ, face2, face3, edge1, edgeBG, edgeCH, edgeDI, edgeEJ, edgeFK, edge2, H, edgeGH, edgeHI, edgeIJ, edgeJK, edge3, I, J, K, face1, faceBCHG, faceCDIH, faceDEJISegment(M, M + (0, 0, 2)) → hPoint(h) → NRotate(Polygon[E, D, I, J], (90° * t), Segment[D, E]) → poly2Rotate(Polygon[G, H, I, J, K, L], (90° * t), Segment[I, J]) → poly3Rotate(poly3, (90° * t), Segment[D, E]) → poly3'Rotate(Polygon[C, D, I, H], (60° * t), Segment[D, I]) → poly4Rotate(poly4, (90° * t), Segment[D, E]) → poly4'Mirror(poly4, OrthogonalPlane[Midpoint[D, E], Segment[D, E]]) → poly4'_1Rotate(poly4'_1, (90° * t), Segment[D, E]) → poly5Rotate(C, (60° * t), Segment[D, I]) → C'Mirror(Polygon[D, E, J, I], OrthogonalPlane[Midpoint[D, C'], Segment[D, C']]) → poly6Mirror(poly6, OrthogonalPlane[Midpoint[D, E], Segment[D, E]]) → poly6'Rotate(poly6, (90° * t), Segment[D, E]) → poly6'_1Rotate(poly6', (90° * t), Segment[D, E]) → poly6''Mirror(E, OrthogonalPlane[Midpoint[D, C'], Segment[D, C']]) → E'Mirror(poly4, OrthogonalPlane[Midpoint[E', C'], Segment[E', C']]) → poly4'_2Rotate(poly4'_2, (90° * t), Segment[D, E]) → poly7Rotate(poly3, (90° * t), Segment[D, E]) → poly3'_1Polygon(A, B, 6, xOyPlane) → poly8, i, R, j, k, l, m, n, O, P, QRotate(poly6', (90° * t), Segment[D, E]) → poly6''_1Rotate(poly4'_1, (90° * t), Segment[D, E]) → poly9Rotate(Polygon[E, D, I, J], (90° * t), Segment[D, E]) → poly10Rotate(poly4, (90° * t), Segment[D, E]) → poly4'_3Rotate(poly6, (90° * t), Segment[D, E]) → poly6'_2Rotate(poly4'_2, (90° * t), Segment[D, E]) → poly11
AI 绘图提示语参考
绘制一个正六棱柱的展开图。先画一个正六边形作为底面,再以该六边形为底向上拉伸形成三维棱柱,棱柱高为4。随后将棱柱的六个侧面(矩形)和两个底面(六边形)分别绕其公共边旋转或镜像,平铺到同一平面上,形成完整的展开图。展开图中包含六个矩形侧面的展开形状和两个六边形底面,各面之间通过公共边相连,可清晰看到每个面的尺寸。整体展示从立体到平面的变换过程,便于计算表面积。
以上提示语为根据原始绘图命令整理而来,仅供参考。