金字塔、LCM与GCD、对称性、风筝形与乘法动画演示
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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
①本范例通过动画演示金字塔、LCM(最小公倍数)、GCD(最大公约数)、对称性、风筝形等几何图形与代数概念;②涉及核心数学概念包括:最小公倍数与最大公约数的几何表示、对称变换、风筝形性质、乘法原理;③作图要点:运用了Line(线段)、OrthogonalLine(垂线)、Point(点)、Ray(射线)、Midpoint(中点)、Segment(线段)、Circle(圆)、Intersect(交点)、CircleSector(扇形)、Polygon(多边形)、Rotate(旋转)、Dilate(缩放)、Angle(角度)等GeoGebra命令与对象;④适合高中数学教学,用于直观展示几何变换与代数应用。
GeoGebra 命令及参数
Line(A, B) → aOrthogonalLine(A, a) → dOrthogonalLine(B, a) → ePoint(d) → CRay(A, C) → cPoint(d) → ERay(A, E) → bRay(A, B) → gPoint(g) → FRay(A, F) → hPoint(h) → GRay(A, E) → iPoint(i) → HMidpoint(H, G) → DSegment(A, H) → jSegment(A, G) → kCircle(A, Min[(0.15 * j), (0.15 * k)]) → pIntersect(p, a, 2) → IIntersect(p, i, 1) → JIntersect(p, a, 1) → KCircleSector(A, J, K) → qPolygon(A, G, H) → poly1, h_1, a_1, g_1Rotate(q, If[0 < f ≤ 1, ((-f) * π / 2), -1.5707963267948966], A) → q'Dilate(G, If[1 < f ≤ 2, 2 - f, 0], D) → G'Segment(G, G') → lRotate(G, If[2 < f ≤ 3, ((f - 2) * π), 3.141592653589793], D) → G'_1Rotate(G', If[2 < f ≤ 3, ((f - 2) * π), 3.141592653589793], D) → G''Segment(G'_1, G'') → l'Angle(H, D, A) → αRotate(G'_1, If[3 < f ≤ 4, ((f - 3) * α), α], D) → LRotate(G'', If[3 < f ≤ 4, ((f - 3) * α), α], D) → G'''Segment(L, G''') → l''