圆柱体体积与表面积计算
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①本范例演示圆柱体的体积与表面积计算;②涉及核心数学概念包括圆柱体几何特性、面积与体积公式、解析几何;③作图要点:使用 GeoGebra 命令如 Midpoint(中点)、Circle(圆)、Segment(线段)、OrthogonalLine(垂线)、Intersect(交点)、Point(点)、Conic(圆锥曲线)、Polygon(多边形)、Vector(向量)、Translate(平移)、Line(直线)等构建圆柱体模型;④适合高中阶段学生及需要立体几何计算的初学者学习使用。
GeoGebra 命令及参数
Midpoint(M, N) → TCircle(T, h) → g1Segment(T, M) → mOrthogonalLine(T, m) → a1Intersect(g1, a1) → K, SPoint(f) → QPoint(f) → PPoint(i) → RPoint(i) → OPoint(i) → LSegment(S_1, T) → nConic(R, L, O, P, Q) → c_1Conic(R, L, O, P, Q) → e1Polygon(S, N, M) → poly1, m_1, s_1, n_1Vector(T, S) → uTranslate(i1, u) → h1Translate(e1, u) → pTranslate(f1, u) → f2Translate(f1, u) → g2Translate(N, u) → HTranslate(M, u) → ISegment(I, M) → aSegment(H, N) → bCircle(A, h / 2) → cPoint(c) → BLine(A, B) → dOrthogonalLine(B, d) → jIntersect(c, d) → C, DLine(D, j) → kCircle(B, (3.141592653589793 * r)) → qIntersect(q, j) → E, FCircle(D, (3.141592653589793 * r)) → sIntersect(s, k) → G, JPolygon(F, E, G, J) → poly2, f_1, e_1, g_1, j_1Circle(B, r) → tIntersect(t, d) → U, VCircle(V, B) → c1Circle(D, r) → d1Intersect(d1, d) → W, ZCircle(W, D) → k1Circle(V, B) → p1Circle(W, D) → q1Polygon(F, E, G, J) → poly3, f_2, e_2, g_2, j_2Midpoint(j_2) → A1Midpoint(e_2) → B1Midpoint(F, A1) → C1Midpoint(C1, F) → D1Midpoint(E, B1) → E1Midpoint(E, E1) → F1Midpoint(D1, F1) → G1Midpoint(F, B) → H1Midpoint(F, H1) → I1Midpoint(J, D) → J1Midpoint(J, J1) → K1Midpoint(I1, K1) → L1Vector(G1, F1) → vVector(G1, D1) → wVector(L1, I1) → zVector(L1, K1) → lPoint(p1) → M1Segment(M1, V) → b1Midpoint(b1) → N1