ASA三角形全等定理动态演示
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①本范例动态演示了ASA(角-边-角)三角形全等定理的原理;②涉及核心数学概念包括三角形全等判定、角度测量、几何变换;③作图要点提炼自GeoGebra命令:Rotate(旋转)、Angle(角度)、Ray(射线)、Point(点)、Intersect(交点)、Polygon(多边形)、Segment(线段)、Min(最小值)、Circle(圆)、CircleSector(扇形)、Dilate(缩放)、Vector(向量)、Translate(平移)、Line(直线);④适合高中数学教学,用于直观理解几何定理和变换应用。
GeoGebra 命令及参数
Rotate(B, α, A) → B'Angle(B, A, B') → βRay(A, B') → fPoint(f) → CRotate(A, (-γ), B) → A'Angle(A', B, A) → δRay(B, A') → gIntersect(f, g) → DPolygon(A, B, D) → poly1, d, a_1, bSegment(A, B) → hSegment(D, B) → iSegment(D, A) → jMin({h, i, j}) → cCircle(A, (0.2 * c)) → eCircle(B, (0.2 * c)) → kIntersect(e, h) → E,Intersect(e, j) → F, IIntersect(k, h) → G,Intersect(k, i) → H, JCircleSector(A, E, F) → pCircleSector(B, H, G) → qRotate(K, β, L) → K'Angle(K, L, K') → εCircle(L, h) → rRay(L, K) → mIntersect(r, m, 1) → MRay(L, K') → nRotate(L, (-γ), M) → L'Angle(L', M, L) → ζRay(M, L') → sIntersect(n, s) → NDilate(A, If[0 < l ≤ 1, 1 - l, 0], L) → A'_1Vector(A, A'_1) → uTranslate(p, u) → p'Line(L, h) → tTranslate(F, u) → F'Point(t) → OAngle(M, L, O) → ηRotate(p', If[1 < l ≤ 2, ((-(l - 1)) * η), (-η)], L) → p''Point(t) → PAngle(P, L, M) → θDilate(B, If[2 < l ≤ 3, 3 - l, 0], L) → B'_1Vector(B, B'_1) → vTranslate(A, v) → A'_2Translate(B, v) → B'_2Segment(A'_2, B'_2) → h'Rotate(A'_2, If[3 < l ≤ 4, ((l - 3) * θ), θ], L) → QRotate(B'_2, If[3 < l ≤ 4, ((l - 3) * θ), θ], L) → RSegment(Q, R) → h''Dilate(B, If[4 < l ≤ 5, 5 - l, 0], M) → B'_3Vector(B, B'_3) → wTranslate(q, w) → q'Line(M, g) → f_1Point(f_1) → SAngle(N, M, S) → τRotate(q', If[5 < l ≤ 6, ((l - 5) * ((2 * π) - τ)), (2 * π) - τ], M) → q''Dilate(B, If[6 < l ≤ 7, 7 - l, 0], M) → B'_4Vector(B, B'_4) → u_1Translate(A, u_1) → A'_3Translate(B, u_1) → B'_5Translate(D, u_1) → D'Polygon(A'_3, B'_5, D') → poly1', d', a'_3, b'_5Rotate(A'_3, If[7 < l ≤ 8, ((-(l - 7)) * τ), (-τ)], M) → TRotate(B'_5, If[7 < l ≤ 8, ((-(l - 7)) * τ), (-τ)], M) → URotate(D', If[7 < l ≤ 8, ((-(l - 7)) * τ), (-τ)], M) → D''Polygon(T, U, D'') → poly1'', d'', t_1, u_2