内心与内切圆动态探究
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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本范例演示了三角形内心的动态变化及其内切圆的绘制过程;②涉及核心数学概念包括内心、内切圆、角度、线性回归、集合论、超几何分布、单位圆、随机实验等;③作图要点提炼自GeoGebra命令:线段、斜率、点在图形上、多边形、角度、旋转、直线、交点、射线;对象包括A、B、f、m、a、b、C、g、h、poly1、c、a_1、b_1、α、β、γ、B'、δ、i、D、A'、ε、j、E、C'、ζ、k、F、n、p、I、η、θ、ι、l、q、m_1、d;④适合高中及以上数学学习者,用于理解几何变换与概率统计的结合应用。
GeoGebra 命令及参数
Segment(A, B) → fSlope(f) → mPointIn(b) → CSegment(B, C) → gSegment(C, A) → hPolygon(A, B, C) → poly1, c, a_1, b_1Angle(poly1) → α, β, γRotate(B, α / 2, A) → B'Angle(B, A, B') → δLine(A, B') → iIntersect(g, i) → DRotate(A, γ / 2, C) → A'Angle(A, C, A') → εLine(C, A') → jIntersect(j, f) → ERotate(C, β / 2, B) → C'Angle(C, B, C') → ζLine(B, C') → kIntersect(k, h) → FRay(C, E) → nRay(B, F) → pIntersect(p, n) → IAngle(I, A, C) → ηAngle(E, C, B) → θAngle(F, B, A) → ιRay(A, I) → lLine(A, C) → qSlope(q) → m_1