另一个特殊三角形及其性质(二)
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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
CCSS High School: Geometry (Congruence) Volume 2
Gail LeBlancCCSS High School: Geometry (Congruence) Volume 2
CCSS High School: Geometry (Congruence) Volume 2
Triangle Theorems
① 本范例演示等边三角形的内角均为 60° 以及其内切圆、外接圆等相关性质。② 涉及等边三角形、等角三角形、角平分线、内切圆、几何变换(旋转、缩放、平移)等核心概念。③ 作图使用 Polygon 创建三角形,Dilate、Rotate、Translate 实现缩放、旋转、平移,Segment、Circle、Intersect、CircleSector、CircleArc 构造线段、圆、交点、扇形与圆弧,Vector 用于向量操作。④ 适合初中几何课堂演示、高中几何探究及 GeoGebra 入门教学。
GeoGebra 命令及参数
Polygon(A, B, 3) → poly1, a, b, c, CDilate(A, If[0 < d ≤ 1, 1 - d, 0], B) → A'Segment(A, A') → eDilate(B, If[1 < d ≤ 2, 2 - d, 0], C) → B'Segment(B, B') → fDilate(C, If[2 < d ≤ 3, 3 - d, 0], A) → C'Segment(C, C') → gSegment(A, B) → hSegment(A, C) → iSegment(B, C) → jCircle(A, (0.15 * h)) → kIntersect(k, i, 1) → DIntersect(k, h, 1) → ECircleSector(A, E, D) → pRotate(A, If[3.5 < d ≤ 4.5, ((d - 3.5) * π / 3), 1.0471975511965976], A) → A'_1Rotate(A', If[3.5 < d ≤ 4.5, ((d - 3.5) * π / 3), 1.0471975511965976], A) → A''Segment(A'_1, A'') → e'Rotate(A, If[4.5 < d ≤ 5.5, ((-(d - 4.5)) * π / 3), -1.0471975511965976], B) → A'_2Rotate(A', If[4.5 < d ≤ 5.5, ((-(d - 4.5)) * π / 3), -1.0471975511965976], B) → A''_1Segment(A'_2, A''_1) → e'_1Dilate(A, If[6 < d ≤ 7, 7 - d, 0], B) → A'_3Vector(A, A'_3) → uTranslate(p, u) → p'CircleArc(A, E, D) → qRotate(p', If[7 < d ≤ 8, (((d - 7) * 2) * π / 3), 2.0943951023931953], B) → p''Circle(B, (0.15 * h)) → rIntersect(f, e'_1) → GIntersect(f, e'_1) → HIntersect(f, e'_1) → IIntersect(f, e'_1) → JIntersect(r, j, 1) → FIntersect(r, h, 1) → KCircleArc(B, F, K) → sDilate(B, If[8 < d ≤ 9, 9 - d, 0], C) → B'_1Vector(B, B'_1) → vTranslate(p'', v) → p'''Rotate(p''', If[9 < d ≤ 10, (((d - 9) * 2) * π / 3), 2.0943951023931953], C) → t
AI 绘图提示语参考
绘制一个等边三角形ABC,然后围绕每个顶点进行旋转和缩放操作,生成一系列的线段和圆弧。首先,使用多边形工具创建三角形ABC,接着围绕每个顶点进行旋转和缩放,生成线段和圆弧,最后通过平移和旋转操作,构造出三角形的内切圆和外接圆。
以上提示语为根据原始绘图命令整理而来,仅供参考。