两个相对数的和
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本范例演示了两个相对数相加的过程。核心数学概念包括加法和相对数。通过使用GeoGebra命令如Vector、Segment、Line等,可以直观地展示加法的几何意义。适合初中及以上学生学习。
GeoGebra 命令及参数
Vector(A, B) → uVector(C, D) → vSegment(B, C) → cSegment(E, D) → dLine(G, yAxis) → ePoint(e) → HPoint(yAxis) → IMidpoint(I, H) → JLine(I, yAxis) → gLine(E, xAxis) → hIntersect(e, h) → LSegment(E, L) → iMidpoint(B, A) → MMidpoint(D, C) → NPolygon(P, Q, R, S) → poly1, p, q, r, s_1Point(xAxis) → TLine(T, xAxis) → kPolygon(U, U - (150, 0), U - (150, 50), U - (0, 50)) → poly2, l, m, n, tPolygon(G + (8, 0), G + (300, 0), G + (300, -50), G - (-8, 50)) → poly3, a_1, b_1, c_1, d_1Point(l) → B_1Ray(U, B_1) → f_1Segment(J + (0.9, 65), K + (0.9, 0)) → f