平方差的几何表示

GeoGebra 命令及参数

1. If((a + b + 1) / aspect > a + 3, a + b + 1, ((a + 3) * aspect) - 1) → xmax
2. Polygon(A, A + (a, 0), 4) → poly1, c, d, e, f, B, C
3. Polygon(A, A + (b, 0), 4) → poly2, g, h, i, j, D, E
4. Polygon(A + (0, b), A + (a, b), A + (a, a), A + (0, a)) → poly3, k, l, m, n
5. Rotate(Polygon[D, F, A + (a, 0), A + (b, 0)], ((((t - 1) * restrict(t - 1)) * 90))°, G) → poly4
6. Segment(D, F) → p
7. Rotate(Polygon[D, F, A + (a, 0), A + (b, 0)], 90*°, G) → poly5
8. RotateText(text6, 90*°) → text8
9. RotateText(text4, 90*°) → text7