I am looking to make Five Intersecting Tetrahedra out of wood. I have made the paper model using the instructions here - when it's done, it looks like this. However, I am at a loss when it comes to figuring out the angles at the apex of each point where three units meet. [more inside]
posted by alrightokay on Jun 26, 2009 - 10 answers

3-D folks, Mathematicians, and Artists: Trying to create my own Trompe-l'œil / forced perspective illusionary image to hang on my wall (e.g. the awesome parking garage signage everyone's already seen... more examples here, and here). I'm having trouble faking it with 2-D programs, and the math is puzzling me. [more inside]
posted by jjjjjjjijjjjjjj on Jan 9, 2009 - 34 answers

Does my documentation accompanying this JavaScript function as implemented on this page of my site demonstrate an adequate understanding of the use of trigonometric functions therein? [more inside]
posted by The Confessor on May 13, 2007 - 1 answer

Trigonometry-related design problem inside. [more inside]
posted by glibhamdreck on Mar 19, 2007 - 3 answers

Quick maths [very basic trigometry] question. [more inside]
posted by PuGZ on Jul 30, 2006 - 9 answers

My room has an angled ceiling. I have measured its height at the highest and lowest points, and I have the dimensions of the room. Help me determine what height the ceiling is at a particular point on the floor, and where exactly the skylight is. [more inside]
posted by xo on May 23, 2006 - 11 answers

I'm writing some php functions to produce graphics of 3D pie charts. I don't remember enough trig to actually pull this off. [more inside] [more inside]
posted by y6y6y6 on Nov 8, 2004 - 7 answers

I'd like to learn Math. I'm particularly interested in learning trig and calculus. I'm don't need to learn these disciplines for any purpose. I'm just interested. I'm a reasonably bright guy, with a logical mind (I've worked as a programmer), and I'm a good self-learner. I'm not in a rush (don't mind working at this for a few years). What books/resources would you recommend? I should probably go all the way back to Algebra, which is pretty much where I left off in High School years ago.
posted by grumblebee on Dec 27, 2003 - 12 answers