等腰三角形的最值问题

GeoGebra 命令及参数

1. Segment((-1, 0), (-6, 0)) → a
2. Point(Segment[(-3.5, 0), (-1, 0)]) → A
3. Midpoint(a) → A_1
4. Mirror(A, A_1) → B
5. Circle(A, b) → c
6. Circle(B, b) → d
7. Intersect(c, d, 2) → C
8. Polygon(C, B, A) → poly1, b_1, c_1, b'
9. Perimeter(poly1) → perimeterpoly1
10. PointIn(poly1) → Pointpoly1_1
11. PointIn(poly1) → Pointpoly1
12. Point(xAxis) → D
13. Point(xAxis) → E
14. Mirror(E, D) → G
15. Polygon(F, G, E) → poly2, e_1, f, e'
16. PointIn(poly2) → Pointpoly2_1
17. Perimeter(poly2) → perimeterpoly2
18. PointIn(poly2) → Pointpoly2