Exploracion y reflexion.

http://roble.pntic.mec.es/jarran2/cabriweb/1triangulos/teoremapitagoras.htm

http://www.wordstop.com/pdfs/4color2.pdf

http://www.aritor.com/trigonometria/razones_trigonometricas.html

http://www.thatquiz.org/es/practicetest?GNPE5817

http://www.thatquiz.org/es/practicetest?NCAE5104

http://uk3.hotpotatoes.net/ex/61495/SRKAUEIS.php