Talk:Triangle

I wonder if there's another formula to add for the area of the triangle, based upon dot products of vectors. When you take the vector from point 1 to point 3 as U, and the vector from point 3 to point 2 as V: A = 0.5 * sqrt ((U*U)(V*V)-(U*V)(U*V)). I just derived that based upon the geometric version A=B*H, calculating the point of intersection of the altitude along the base, to be V*U/U*U. If this appears right to others, then someone might add it.

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Could someone redraw the scalene triangle, It isn't scalene. Ooops - yes it is. It isn't acute, but then it doesn't say it is trying to be - sorry.

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Am I the only one who thinks that the geometrical triangle is entitled to reside at triangle? It's far and away the most common usage of the word, and links in the future are naturally going to be made to triangle instead of triangle (geometry). Triangle should have a simple disambig block at the top for the few other meanings. "Triangle" isn't like Orange, which has many possible meanings; it's more like Pentagon, which has a primary meaning and a few derivatives. --Minesweeper 10:03, Mar 6, 2004 (UTC)

I totally agree. I'll have to hear a very good opinion on the current setup in the next few days, or else I'll revert. — Sverdrup (talk) 14:04, 6 Mar 2004 (UTC)

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I'd always been taught to use the term right angled triangles - is the usage right triangle a different regional variant? Is mine the regional variant (UK/Ireland)? What does the wider community say? --Paul

Congratulations

Oh, dear! The diagrams in this page are GOOD! Whoever did them did a good job! Pfortuny 21:49, 31 Mar 2004 (UTC)

I second that. Fantastic page with wonderful diagrams. I learned more than I ever expected (or wanted to) about triangles. - Plutor 14:46, 3 May 2004 (UTC)

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