菱形、正方形、梯形几何构造
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①本范例演示了菱形、正方形和梯形的几何构造与性质;②涉及的核心数学概念包括多边形、角度、距离、解析几何;③作图要点——从下方『构造摘要』提炼用到了Circle(圆)、Intersect(相交)、Distance(距离)、Segment(线段)、Angle(角度)、Point(点)、OrthogonalLine(垂线)、Line(直线)等GeoGebra命令/对象;④适合高中数学教学或几何爱好者学习。
GeoGebra 命令及参数
Circle(A, B) → cCircle(B, A) → dIntersect(c, d, 1) → CIntersect(c, d, 2) → DDistance(A, C) → distanceACSegment(C, A) → aSegment(A, D) → bSegment(C, B) → eSegment(D, B) → fDistance(A, C) → gDistance(B, C) → distanceBCDistance(D, B) → distanceDBDistance(D, A) → distanceDAAngle(A, C, B) → αAngle(C, B, D) → βAngle(D, A, C) → ζAngle(B, D, A) → δCircle(E, 3.4242663447810293) → hPoint(h) → FCircle(F, 3.490866199484813) → kSegment(E, F) → iOrthogonalLine(F, i) → jIntersect(k, j, 1) → GOrthogonalLine(E, i) → lIntersect(h, l, 1) → HOrthogonalLine(H, j) → mDistance(E, H) → distanceEHDistance(F, G) → distanceFGDistance(E, F) → distanceEFDistance(G, H) → distanceGHAngle(j, m) → ηCircle(J, K) → pPoint(p) → ISegment(J, K) → nSegment(J, I) → rSegment(I, K) → sDistance(I, J) → distanceIJDistance(J, K) → distanceJKDistance(I, K) → distanceIKPoint(n) → MLine(M, s) → qIntersect(q, r) → LDistance(L, I) → distanceLIDistance(M, K) → distanceMKDistance(L, M) → distanceLMDistance(I, K) → o