三角形内角和定理演示 by Tim Brzezinski (3)
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所属专题
Congruence (CO) Cluster
Congruence (Vol 2)
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
Gail LeBlancCCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
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Unit 5: Triangle Congruence
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Polygons & Angles
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Polygons & Angles
Geometry: Polygons & Angles
Geometry: Polygons & Angles
①本范例通过动态演示向学生展示任意三角形的内角和恒为180度这一几何现象;②涉及的核心数学概念包括三角形内角、角度测量、几何证明;③作图要点——范例运用了Ray(射线)、Point(点)、Angle(角)、Circle(圆)、Intersect(交点)、Line(线)、Vector(向量)、Translate(平移)、Dilate(缩放)、Rotate(旋转)、Mirror(镜像)、If(条件判断)、Polygon(多边形)等GeoGebra命令与对象;④适合初中及以上学生学习和理解三角形的基本性质,也可用于几何教学演示。
GeoGebra 命令及参数
Ray(A, B) → aRay(B, C) → bRay(C, A) → cPoint(a) → D_1Point(b) → E_1Point(c) → F_1Ray(A, F_1) → dRay(B, D_1) → eRay(C, E_1) → fPoint(e) → DPoint(f) → EPoint(d) → FAngle(B, A, C) → αAngle(C, B, A) → βAngle(A, C, B) → γAngle(F, A, B) → δAngle(D, B, C) → εAngle(E, C, A) → ζCircle(A, 1.5) → gCircle(B, 1.5) → hCircle(C, 1.5) → kIntersect(g, c, 1) → GIntersect(g, a, 1) → HIntersect(g, c, 2) → IIntersect(h, b, 1) → JIntersect(h, a, 1) → KIntersect(h, a, 2) → LIntersect(k, b) → M, NIntersect(k, c) → O,CircleSector(A, H, G) → pCircleSector(B, J, K) → qCircleSector(C, O, M) → rCircleSector(C, N, O) → sCircleSector(B, L, J) → tCircleSector(A, I, H) → c_1Line(C, a) → iVector(B, C) → uVector(A, C) → vTranslate(q, u) → q'Dilate(C, If[0 < j ≤ 1, j, 0], B) → C'Vector(B, C') → wTranslate(q, w) → q'_1Rotate(q'_1, If[0 < j, (((-j) * 180))°, 180*°], C') → d_1Mirror(q', C) → q''Dilate(A, If[1 < j ≤ 2, 2 - j, 0], C) → C'_1Vector(A, C'_1) → mTranslate(p, m) → p'Rotate(p', If[1 < j ≤ 2, (((j - 1) * 180))°, 180*°], C'_1) → p''Dilate(C, If[0 < n ≤ 1, n, 0], B) → C'_2Dilate(A, If[1 < n ≤ 2, 2 - n, 0], C) → A'Vector(B, C'_2) → u_1Vector(A, A') → v_1If(0 < n ≤ 1, Translate[t, u_1], Translate[t, u]) → e_1If(1 < n ≤ 2, Translate[c_1, v_1], Translate[c_1, v]) → f_1Polygon(A, B, C) → poly1, c_2, a_2, b_1Line(A, B) → g_1Line(A, B) → i_1Point(i) → PPoint(i) → QRay(C, Q) → j_1Ray(C, P) → k_1Angle(A, C, B) → ηCircleSector(C, M, O) → p_1CircleSector(B, K, J) → q_1CircleSector(A, G, H) → r_1Translate(q_1, w) → s_1Translate(q_1, w) → t_1Rotate(t_1, If[0 < j, (((-j) * 180))°, 180*°], C') → d_2Vector(B, C) → w_1Translate(q_1, w_1) → e_2Rotate(e_2, 180*°, C) → f_2Translate(r_1, m) → g_2Rotate(g_2, If[1 < j ≤ 2, (((-(j - 1)) * 180))°, 180*°], C'_1) → h_2CircleSector(C, O, N) → k_2CircleSector(B, J, L) → p_2CircleSector(A, H, I) → q_2Translate(p_2, u_1) → r_2Translate(p_2, u) → s_2Translate(q_2, v_1) → t_2
AI 绘图提示语参考
画一个三角形,并动态展示其三个内角之和为180度。首先画出三角形的三条边,然后在每条边上取点,连接这些点形成新的三角形。接着,在原三角形的顶点处画出外接圆,并在圆上截取相应的弧线。最后,将这些弧线组合起来,直观地展示三个内角之和等于一个平角。
以上提示语为根据原始绘图命令整理而来,仅供参考。