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- .geometry "version 0.1";
- v1 = .free(-0.554036, -0.452804, "1");
- v2 = .free(-0.088919, 0.512996, "2");
- v3 = .free(0.849521, -0.337893, "3");
- l1 = .l.vv(v1, v2);
- l2 = .l.vv(v2, v3);
- l3 = .l.vv(v3, v1);
- l4 = .l.vlperp(v1, l2, .yellow, .longline);
- l5 = .l.vlperp(v3, l1, .yellow, .longline);
- l6 = .l.vlperp(v2, l3, .yellow, .longline);
- v4 = .v.ll(l4, l6, .red);
- .text("The three altitudes of a triangle meet");
- .text("at a point, called the orthocenter of the");
- .text("triangle. The three yellow lines are");
- .text("altitudes, and points 1, 2, and 3 can be");
- .text("moved.");
-