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- .geometry "version 0.1";
- v1 = .free(-0.355978, -0.013587, "1");
- v2 = .free(-0.078804, 0.298913, "2");
- v3 = .free(0.266304, -0.125, "3");
- l1 = .l.vv(v1, v2, .longline);
- l2 = .l.vv(v2, v3, .longline);
- l3 = .l.vv(v3, v1, .longline);
- c1 = .c.lll(l1, l2, l3, 1);
- c2 = .c.lll(l1, l2, l3, 2);
- c3 = .c.lll(l1, l2, l3, 3);
- c4 = .c.lll(l1, l2, l3, 4);
- v4 = .v.vvmid(v2, v3, .invisible, .plus);
- v5 = .v.vvmid(v3, v1, .invisible, .plus);
- v6 = .v.vvmid(v1, v2, .invisible, .plus);
- c5 = .c.vvv(v4, v5, v6, .red);
- .text("Feuerbach's Theorem:");
- .text("");
- .text("The nine point circle (in red) is tangent to all four");
- .text("of the tri-tangent circles for a triangle.");
-