直角三角形边上的相似矩形
几何画板及绘图内容加载中,请稍等……
①本范例演示在直角三角形三边构造相似矩形,揭示其面积关系与勾股定理的联系;②核心数学概念包括相似图形、勾股定理、面积计算、比例关系;③作图要点运用了线段、垂线、点、圆、交点、多边形、LaTeX等GeoGebra命令与对象;④适合高中数学教学,用于理解相似性与勾股定理的应用。
GeoGebra 命令及参数
Segment(A, B) → aOrthogonalLine(A, a) → bPoint(b) → CSegment(C, A) → cSegment(C, B) → dCircle(C, d / 3) → eOrthogonalLine(C, d) → fIntersect(e, f) → D, ESegment(C, E) → gOrthogonalLine(E, g) → hOrthogonalLine(B, d) → iIntersect(i, h) → FSegment(E, F) → jSegment(B, F) → kCircle(C, c / 3) → pOrthogonalLine(C, c) → lIntersect(p, l) → G, HSegment(G, C) → mOrthogonalLine(G, m) → nOrthogonalLine(A, c) → qIntersect(n, q) → ISegment(G, I) → rSegment(I, A) → sOrthogonalLine(A, a) → tCircle(A, a / 3) → c_1Intersect(c_1, t) → J, KSegment(A, J) → a_1OrthogonalLine(J, a_1) → b_1OrthogonalLine(B, a) → d_1Intersect(b_1, d_1) → LSegment(B, L) → e_1Segment(L, J) → f_1Polygon(C, B, F, E) → S, c_2, b_2, f_2, e_2LaTeX(S, true, true) → text1Polygon(C, G, I, A) → Q, c_3, g_1, i_1, a_2LaTeX(Q, true, true) → text2Polygon(A, J, L, B) → R, a_3, j_1, l_1, b_3LaTeX(R, true, true) → text3LaTeX(SumQplusR, true, true) → text4