The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

Huey · Daedalian Member

Draw three lines to make 7 independent triangles.

-Independent as in: No triangles within triangles.

Huey · Daedalian Member

Straight lines

ctrlaltdel · Member of the Daedalians

can i draw them and then fold the paper?

do i have to draw them on a euclidean plane?

can i draw them onto a sphere?

groza528 · No Place Like Home

If you draw them on a sphere you can get 8. [e]and without those already given even. But they wouldn't be straight.[/e]

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If you think the little things don't matter, try falling asleep with a mosquito in your room.

[This message has been edited by groza528 (edited 01-30-2002 09:56 AM).]

Milt · Daedalian Member

Huey · Daedalian Member

That was fast. Good job Milt. It's a star w/ 2 additional triangles at its base.

What's the difference between a Eularian Plane and a regular plane? I know a Eularian graph is when a path exists between every edge and visit every path only once, except the beginning and ending vertex.

Huey · Daedalian Member

nevermind, that's a EUCLID plane. My bad.

ctrlaltdel · Member of the Daedalians

oh the puzzle was to ADD three MORE lines to your picture... hmm... that changes everything...

groza528 · No Place Like Home

Happy birthday Milt!

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If you think the little things don't matter, try falling asleep with a mosquito in your room.

Milt · Daedalian Member

Thanks, groza! And thanks for the puzzle Huey, it's a good one. I have about 150 little diagrams.