Math 5 - Trigonometry Links – Spring ’11Here's a virtual manipulative for experimenting with triangles to learn about congruence. See why the congruence tests (SSS, SAS, ASS, AAS) actually work. It shows that if you have, for instance, 3 fixed-length sides (SSS), there is a unique triangle you can construct with these. http://nlvm.usu.edu/en/nav/frames_asid_165_g_1_t_3.html?open=instructions Wolfram has some basic geometry demonstrations. Alexander Bogolomny's Cut The Knot site is full of good math stuff. Whistler's Alley has some geometric constructions. The National Library of Virtual Manipulatives has some nice geometrical items. They're polynomial multiplication visualization, for instance, is nice. === http://www.ltcconline.net/greenl/java/index.html Additive (Fourier) Synthesis applet Geometry Chapter - and some answers
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