Bridges (triangles are very strong structuraly speaking) Roof of your house. Highway Snowplows (on the big trucks not ones on a pickup) Door stop (the ones to keep them open, usually
http://wiki.answers.com/Q/How_are_triangles_used_i...

How is geometry used in everyday life? When you're studying the subject, the science of lines and angles can seem like nothing more than a dull exercise in formulas and predictability
http://www.life123.com/parenting/education/geometr...

1. Lay the triangle bandage on the ground in a triangle shape. Fold the point of the triangle in to the horizontal edge of the bandage. Fold the bandage twice so you have a 2 to
http://www.ehow.com/how_8487738_usetrianglebanda...

My guess is that it is meant for the LaplaceBeltrami operator, which commonly is written in latex as. It is a generalization of the Laplace operator for functions defined over surfaces
http://www.quora.com/Unicode/Howisthesintrian...
