菱形的面积 by Edward Knote
几何画板及绘图内容加载中,请稍等……
所属专题
Area Formulas
这个范例演示了菱形的面积计算方法。核心数学概念包括几何作图、向量和三角函数。通过使用GeoGebra命令如Point、Segment、Polygon等,可以构造菱形并计算其面积。适合初中及以上学生学习几何和三角函数。
GeoGebra 命令及参数
Point(Circle[A, a]) → BSegment(A, B) → bCircle(A, a) → cPoint(c) → CSegment(A, C) → dCircle(C, a) → eLine(C, b) → fIntersect(e, f, 2) → DSegment(C, D) → gSegment(D, B) → hSegment(A, D) → mSegment(C, B) → nIntersect(m, n) → EPolygon(C, E, D) → P, d_1, c_1, e_1Polygon(C, E, A) → Q, a_1, c_2, e_2Polygon(A, E, B) → R, b_1, a_2, e_3Polygon(B, D, E) → S, e_4, b_2, d_2Midpoint(D, C) → FMidpoint(D, B) → GMidpoint(A, B) → HMidpoint(A, C) → IMirror(C, I) → C'Mirror(E, I) → E'Mirror(A, I) → A'Mirror(C, F) → C'_1Mirror(E, F) → E'_1Mirror(D, F) → D'Mirror(B, G) → B'Mirror(D, G) → D'_1Mirror(E, G) → E'_2Mirror(A, H) → A'_1Mirror(E, H) → E'_3Mirror(B, H) → B'_1Rotate(C, α, I) → C'_2Rotate(E, α, I) → E'_4Rotate(A, α, I) → A'_2Polygon(C'_2, E'_4, A'_2) → Q', a'_2, c'_2, e'_4Rotate(C, (-β), F) → C'_3Rotate(E, (-β), F) → E'_5Rotate(D, (-β), F) → D'_2Polygon(C'_3, E'_5, D'_2) → P', d'_2, c'_3, e'_5Rotate(A, γ, H) → A'_3Rotate(E, γ, H) → E'_6Rotate(B, γ, H) → B'_2Polygon(A'_3, E'_6, B'_2) → R', b'_2, a'_3, e'_6Rotate(B, (-δ), G) → B'_3Rotate(D, (-δ), G) → D'_3Rotate(E, (-δ), G) → E'_7Polygon(B'_3, D'_3, E'_7) → S', e'_7, b'_3, d'_3