乘法与比例变化

GeoGebra 命令及参数

1. Textfield(f_1) → factor1
2. Textfield(f_2) → factor2
3. Textfield(u) → unitinput
4. Segment(UNIT, O) → s_{unit}
5. Segment(Multiplier, O) → s_{multiplier}
6. Segment(Multiplicand, O) → s_{multiplicand}
7. Segment(UNIT, Multiplier) → s_2
8. Line(Multiplicand, s_2) → a
9. Intersect(yAxis, a) → Product
10. Segment(Product, Multiplicand) → s_1
11. Segment(Product, O) → s_{product}
12. Midpoint(s_{product}) → M_{product}
13. Midpoint(s_{multiplier}) → M_{multiplier}
14. Midpoint(s_{multiplicand}) → M_{multiplicand}
15. Max({(f_1 * f_2), ((-f_1) * f_2), 6}) → max