直角、锐角和钝角三角形与勾股定理

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → B
3. Semicircle(A, B) → c
4. Point(xAxis) → C
5. Point(c) → E
6. Polygon(C, E, 4) → poly1, f, g, h, i, D, F
7. Point(xAxis) → G
8. Polygon(G, C, 4) → poly2, j, k, l, m, H, I
9. Polygon(E, G, 4) → poly3, n, p, q, r, J, K
10. Midpoint(E, J) → L
11. Midpoint(E, A) → M
12. Midpoint(C, I) → N
13. Angle(G, C, E) → α
14. Polygon(E, C, G) → poly4, g_1, e, c_1