勾股定理代数证明
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①本范例演示勾股定理的代数证明方法;②涉及核心数学概念包括勾股定理、树状图、有理数、直方图、正切函数和多边形;③作图要点提炼自GeoGebra命令:Intersect(交点)、Segment(线段)、Distance(距离)、Angle(角度);④适合高中阶段学生学习和理解勾股定理的代数证明过程。
GeoGebra 命令及参数
Intersect(xAxis, yAxis) → ASegment(B, C) → bSegment(C, D) → b_1Segment(D, A) → cSegment(A, B) → dSegment(L, K) → eSegment(K, I) → fSegment(I, E) → gSegment(E, L) → hDistance(B, K) → distanceBKDistance(K, C) → distanceKCIntersect(b, d) → FIntersect(b, e) → GSegment(F, G) → jIntersect(c, d) → HIntersect(d, e) → JSegment(H, J) → kDistance(H, J) → distanceHJIntersect(c, g) → NSegment(M, N) → lIntersect(b, b_1) → OIntersect(b_1, f) → PSegment(O, P) → mDistance(J, F) → distanceJFDistance(O, P) → distanceOPDistance(H, N) → distanceHNDistance(M, N) → distanceMNDistance(P, M) → distancePMDistance(J, G) → distanceJGDistance(G, P) → distanceGPDistance(P, N) → distancePNDistance(N, J) → distanceNJAngle(A, B, C) → γAngle(B, C, D) → δAngle(L, K, I) → εAngle(I, E, L) → ζAngle(E, L, K) → ηAngle(K, I, E) → θAngle(D, A, B) → ιAngle(C, D, A) → κ