对应角快速探索
几何画板及绘图内容加载中,请稍等……
所属专题
Year 7 (Angles)
本互动几何作图范例通过变换几何方法探索对应角定理。通过调整点的位置,观察并验证对应角相等的性质。涉及的核心数学概念包括角、几何变换和三角形。使用了点、线、旋转、角度测量、圆、交点、线段等 GeoGebra 命令。适合初中及以上学生进行几何探索和学习。
GeoGebra 命令及参数
Point(y = 0) → ALine(A, B) → fRotate(B, α, A) → B'Angle(B, A, B') → γLine(A, B') → gRotate(B', β, A) → B''Angle(B', A, B'') → δLine(A, B'') → hCircle(A, a) → cIntersect(c, h, 2) → CLine(C, g) → iCircle(C, A) → dCircle(A, C) → eIntersect(e, h, 2) → JSegment(A, C) → jCircle(A, (0.3 * j)) → kCircle(C, (0.3 * j)) → pIntersect(h, j) → KIntersect(h, j) → LIntersect(h, j) → MIntersect(p, h) → N, OIntersect(k, h) → P, QIntersect(g, xAxis) → RIntersect(g, xAxis) → SIntersect(k, g) → T, UIntersect(p, i, 2) → VIntersect(p, i, 1) → WCircleSector(A, U, Q) → qCircle(C, j / 2) → g_1Circle(A, j / 2) → h_1Intersect(g_1, i, 2) → DIntersect(g_1, i, 1) → EIntersect(g_1, h, 2) → HIntersect(g_1, h) → I, ZIntersect(h_1, h) → A_1, B_1Intersect(g, xAxis) → C_1Intersect(g, xAxis) → D_1Intersect(h_1, g) → E_1, F_1Point(j) → G_1Vector(A, G_1) → uTranslate(q, u) → q'Segment(A, G_1) → lRay(A, A_1) → mRay(C, H) → nVector(A, G_1) → vSegment(G_1, C) → sCircleArc(A, U, Q) → t